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+The chemstyle bundle - Schemes and style for chemistry
+======================================================
+
+The `chemstyle` bundle provides two packages: `chemstyle` and
+`chemscheme`.  Both are intended to help chemists create floating
+graphics and match published styles.
+
+The `chemscheme` package consists of two parts, both related to
+chemical schemes.  The package adds a `scheme` float type to the
+LaTeX default types figure and table. The `scheme` float type
+acts in the same way as those defined by the LaTeX kernel, but
+is intended for chemical schemes.  The package also provides a
+method for adding automatic chemical numbering to schemes.
+
+The `chemstyle` package provides a "one-stop shop" for setting up
+formatting of LaTeX documents following the editorial policies
+of various chemical journals.  It provides a number of handy
+chemistry-related commands, and loads several support packages
+to aid the chemist.
+
+Installation
+------------
+
+The package is supplied in `.dtx` format and as a pre-extracted
+`.zip` file, `chemstyle.tds.zip`. The later is most convenient
+for most users: simply unzip this in your local `texmf`
+directory. If you want to unpack the `.dtx` yourself, running
+`tex chemstyle.dtx` will extract the package whereas `latex
+chemstyle.dtx` will extract it and also typeset the
+documentation.
+
+Typesetting the documentation requires a number of packages in
+addition to those needed to use the package. This is mainly
+because of the number of demonstration items included in the
+text. To compile the documentation without error, you will
+need the packages:
+ - `booktabs`
+ - `csquotes`
+ - `helvet`
+ - `mathpazo`
+ - `mhchem`
+ - `microtype`
+ - `listings`
+ - `lmodern`
+
diff --git a/macros/latex/contrib/chemstyle/chemscheme.cdx b/macros/latex/contrib/chemstyle/chemscheme.cdx
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+++ b/macros/latex/contrib/chemstyle/chemscheme.cdx
diff --git a/macros/latex/contrib/chemstyle/chemstyle.dtx b/macros/latex/contrib/chemstyle/chemstyle.dtx
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--- /dev/null
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+% \iffalse meta-comment
+%<*internal>
+\iffalse
+%</internal>
+%<*readme>
+The chemstyle bundle - Schemes and style for chemistry
+======================================================
+
+The `chemstyle` bundle provides two packages: `chemstyle` and
+`chemscheme`.  Both are intended to help chemists create floating
+graphics and match published styles.
+
+The `chemscheme` package consists of two parts, both related to
+chemical schemes.  The package adds a `scheme` float type to the
+LaTeX default types figure and table. The `scheme` float type
+acts in the same way as those defined by the LaTeX kernel, but
+is intended for chemical schemes.  The package also provides a
+method for adding automatic chemical numbering to schemes.
+
+The `chemstyle` package provides a "one-stop shop" for setting up
+formatting of LaTeX documents following the editorial policies
+of various chemical journals.  It provides a number of handy
+chemistry-related commands, and loads several support packages
+to aid the chemist.
+
+Installation
+------------
+
+The package is supplied in `.dtx` format and as a pre-extracted
+`.zip` file, `chemstyle.tds.zip`. The later is most convenient
+for most users: simply unzip this in your local `texmf`
+directory. If you want to unpack the `.dtx` yourself, running
+`tex chemstyle.dtx` will extract the package whereas `latex
+chemstyle.dtx` will extract it and also typeset the
+documentation.
+
+Typesetting the documentation requires a number of packages in
+addition to those needed to use the package. This is mainly 
+because of the number of demonstration items included in the 
+text. To compile the documentation without error, you will 
+need the packages:
+ - `booktabs`
+ - `csquotes`
+ - `helvet`
+ - `mathpazo`
+ - `mhchem`
+ - `microtype`
+ - `listings`
+ - `lmodern`
+%</readme>
+%<*internal>
+\fi
+\def\nameofplainTeX{plain}
+\ifx\fmtname\nameofplainTeX\else
+  \expandafter\begingroup
+\fi
+%</internal>
+%<*install>
+\input docstrip.tex
+\keepsilent
+\askforoverwritefalse
+\preamble
+----------------------------------------------------------------
+The chemstyle bundle --- Schemes and style for chemistry
+E-mail: joseph.wright@morningstar2.co.uk
+Released under the LaTeX Project Public License v1.3c or later
+See http://www.latex-project.org/lppl.txt
+----------------------------------------------------------------
+
+\endpreamble
+\postamble
+
+Copyright (C) 2006-2011,2013 by
+  Joseph Wright <joseph.wright@morningstar2.co.uk>
+
+It may be distributed and/or modified under the conditions of
+the LaTeX Project Public License (LPPL), either version 1.3c of
+this license or (at your option) any later version.  The latest
+version of this license is in the file:
+
+   http://www.latex-project.org/lppl.txt
+
+This work is "maintained" (as per LPPL maintenance status) by
+  Joseph Wright.
+
+This work consists of the file  chemstyle.dtx and
+                                chemstyle.cdx,
+          and the derived files chemstyle.pdf,
+                                chemstyle.ins,
+                                chemstyle.sty,
+                                chemscheme.sty,
+                                and a number of .cfg files.
+                                
+\endpostamble
+\usedir{tex/latex/chemstyle}
+\generate{
+  \file{chemstyle.sty}{\from{chemstyle.dtx}{package}}
+  \file{chemscheme.sty}{\from{chemstyle.dtx}{chemscheme}}
+}
+\usedir{tex/latex/chemstyle/config}
+\generate{
+  \file{angew.chemstyle.cfg}{\from{chemstyle.dtx}{angew}}
+  \file{ic.chemstyle.cfg}{\from{chemstyle.dtx}{ic}}
+  \file{jacs.chemstyle.cfg}{\from{chemstyle.dtx}{jacs}}
+  \file{jomc.chemstyle.cfg}{\from{chemstyle.dtx}{jomc}}
+  \file{rsc.chemstyle.cfg}{\from{chemstyle.dtx}{rsc}}
+  \file{orglett.chemstyle.cfg}{\from{chemstyle.dtx}{orglett}}
+  \file{tetlett.chemstyle.cfg}{\from{chemstyle.dtx}{tetlett}}
+}
+%</install>
+%<install>\endbatchfile
+%<*internal>
+\usedir{source/latex/chemstyle}
+\generate{
+  \file{chemstyle.ins}{\from{chemstyle.dtx}{install}}
+}
+\nopreamble\nopostamble
+\usedir{doc/latex/chemstyle}
+\generate{
+  \file{README.txt}{\from{chemstyle.dtx}{readme}}
+  \file{chemstyle-demo.tex}{\from{chemstyle.dtx}{demo}}
+  \file{scheme-one.eps}{\from{chemstyle.dtx}{scheme}}
+  \file{scheme-two.eps}{\from{chemstyle.dtx}{scheme,labels}}
+}
+\ifx\fmtname\nameofplainTeX
+  \expandafter\endbatchfile
+\else
+  \expandafter\endgroup
+\fi
+%</internal>
+%<*package|chemscheme>
+\NeedsTeXFormat{LaTeX2e}
+%</package|chemscheme>
+%<*driver>
+\documentclass[a4paper]{ltxdoc}
+\usepackage[T1]{fontenc}
+\usepackage{array,booktabs,chemstyle,csquotes,lmodern}
+\usepackage[scaled=0.95]{helvet}
+\usepackage[final]{listings,microtype}
+\usepackage[osf]{mathpazo}
+\usepackage[version=3]{mhchem}
+\IfFileExists{auto-pst-pdf.sty}{
+  \usepackage[crop=off,ext=dtx,final,runs=2]{auto-pst-pdf}
+}{
+  \PackageWarning{chemstyle}{%
+    No auto-pst-pdf found:\MessageBreak
+    Compile documentation with latex \MessageBreak
+    (and not pdflatex)%
+  }
+}
+\usepackage[numbered]{hypdoc}
+\EnableCrossrefs
+\CodelineIndex
+\RecordChanges
+\begin{document}
+  \DocInput{chemstyle.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+%\CheckSum{0}
+%
+%\GetFileInfo{chemstyle.sty}
+%
+%\makeatletter
+%
+%^^A \DescribeOption is in l3doc but not ltxdoc
+%\newcommand*{\DescribeOption}{^^A
+%  \leavevmode
+%  \@bsphack
+%  \begingroup
+%    \MakePrivateLetters
+%    \Describe@Option
+%}
+%\newcommand*{\Describe@Option}[1]{^^A
+%    \endgroup
+%  \marginpar{^^A
+%    \raggedleft
+%    \PrintDescribeEnv{#1}^^A
+%  }%
+%  \SpecialOptionIndex{#1}^^A
+%  \@esphack
+%  \ignorespaces
+%}
+%\newcommand*{\SpecialOptionIndex}[1]{^^A
+%  \@bsphack
+%  \index{^^A
+%    #1\actualchar{\protect\ttfamily#1} (option)\encapchar usage^^A
+%  }^^A
+%  \index{^^A
+%    options:\levelchar#1\actualchar{\protect\ttfamily#1}
+%    \encapchar usage^^A
+%  }^^A
+%  \@esphack
+%}
+%
+%^^A For creating examples with nice highlighting of code, and so
+%^^A on; based on the system used in the listings source (lstsample).
+%\lst@RequireAspects{writefile}
+%\newsavebox{\LaTeXdemo@box}
+%\lstnewenvironment{LaTeXdemo}[1][code and example]{^^A
+%  \global\let\lst@intname\@empty
+%  \expandafter\let\expandafter\LaTeXdemo@end
+%    \csname LaTeXdemo@#1@end\endcsname
+%  \@nameuse{LaTeXdemo@#1}^^A
+%}{^^A
+%  \LaTeXdemo@end
+%}
+%\newcommand*\LaTeXdemo@new[3]{^^A
+%  \expandafter\newcommand\expandafter*\expandafter
+%    {\csname LaTeXdemo@#1\endcsname}{#2}^^A
+%  \expandafter\newcommand\expandafter*\expandafter
+%    {\csname LaTeXdemo@#1@end\endcsname}{#3}^^A
+%}
+%\newcommand*\LaTeXdemo@common{^^A
+%  \setkeys{lst}{
+%    basicstyle   = \small\ttfamily,
+%    basewidth    = 0.51em,
+%    gobble       = 3,
+%    keywordstyle = \color{blue},
+%    language     = [LaTeX]{TeX},
+%    moretexcs    = {
+%      ce,
+%      cmc,
+%      cstsetup,
+%      etc,
+%      eg,
+%      etal,
+%      floatcontentscenter,
+%      floatcontentscentre,
+%      floatcontentsleft,
+%      floatcontentsright,
+%      floatsetup,
+%      floatstyle,
+%      Hz,
+%      ie,
+%      iBu,
+%      iPr,
+%      includegraphics,
+%      invacuo,
+%      latin,
+%      mmHg,
+%      molar,
+%      Molar,
+%      nBu,
+%      nPr,
+%      restylefloat,
+%      sBu,
+%      standardstate,
+%      tBu
+%    }
+%  }^^A 
+%}
+%\newcommand*\LaTeXdemo@input{^^A
+%  \MakePercentComment
+%  \catcode`\^^M=10\relax
+%  \small
+%  \begingroup
+%    \setkeys{lst}{
+%      SelectCharTable=\lst@ReplaceInput{\^\^I}{\lst@ProcessTabulator}
+%    }^^A
+%    \leavevmode 
+%      \input{chemstyle.tmp}^^A
+%  \endgroup
+%  \MakePercentIgnore
+%}
+%\LaTeXdemo@new{code and example}{^^A
+%  \setbox\LaTeXdemo@box=\hbox\bgroup
+%    \lst@BeginAlsoWriteFile{chemstyle.tmp}^^A
+%    \LaTeXdemo@common
+%}{^^A
+%    \lst@EndWriteFile
+%  \egroup
+%  \begin{center}
+%    \ifdim\wd\LaTeXdemo@box>0.48\linewidth\relax
+%      \hbox to\linewidth{\box\LaTeXdemo@box\hss}^^A
+%        \begin{minipage}{\linewidth}
+%          \LaTeXdemo@input
+%        \end{minipage}
+%    \else
+%      \begin{minipage}{0.48\linewidth}
+%        \LaTeXdemo@input
+%      \end{minipage}
+%      \hfill
+%      \begin{minipage}{0.48\linewidth}
+%        \hbox to\linewidth{\box\LaTeXdemo@box\hss}^^A
+%      \end{minipage}
+%    \fi
+%  \end{center}
+%}
+%\LaTeXdemo@new{code and float}{^^A
+%  \lst@BeginAlsoWriteFile{chemstyle.tmp}^^A
+%  \LaTeXdemo@common
+%}{^^A
+%  \lst@EndWriteFile
+%  \LaTeXdemo@input
+%}
+%\LaTeXdemo@new{code only}{^^A
+%  \LaTeXdemo@common
+%}{^^A
+%}
+%
+%\providecommand*\eTeX{\ensuremath{\varepsilon}-\TeX}
+%\providecommand*\file{\texttt}
+%\providecommand*\opt{\texttt}
+%\providecommand*\pkg{\textsf}
+%
+%\DoNotIndex{\begin,\documentclass,\end,\usepackage}
+%
+%\makeatother
+%
+%\title{^^A
+%  The \textsf{chemstyle} bundle --- Schemes and style for 
+%    chemistry\thanks{^^A
+%    This file describes version \fileversion, last revised 
+%    \filedate.^^A
+%  }^^A
+%}
+%\author{^^A
+%  Joseph Wright\thanks{E-mail: joseph.wright@morningstar2.co.uk}^^A
+%}
+%\date{Released \filedate}
+%
+%\maketitle
+%
+%\changes{v1.0}{2006/08/06}{Initial release of package}
+%\changes{v2.0f}{2010/01/30}{Detect use of \pkg{achemso} class and
+%  abort loading of \pkg{chemstyle} and \pkg{chemscheme}}
+%
+%\begin{abstract}
+%  The \textsf{chemstyle} bundle provides two packages: 
+%  \textsf{chemstyle} and \textsf{chemscheme}.  Both are intended to 
+%  help chemists create floating graphics and match published styles.
+%
+%  The \textsf{chemscheme} package consists of two parts, both related 
+%  to chemical schemes.  The package adds a scheme float type to the 
+%  \LaTeX\ default types figure and table. The scheme float type acts in
+%  the same way as those defined by the \LaTeX\ kernel, but is intended 
+%  for chemical schemes.  The package also provides a method for adding 
+%  automatic chemical numbering to schemes.
+%
+%  The \textsf{chemstyle} package provides a \enquote{one-stop shop} for 
+%  setting up formatting of \LaTeX\ documents following the editorial
+%  policies of various chemical journals.  It provides a number of handy
+%  chemistry-related commands, and loads several support packages to aid 
+%  the chemist.
+%\end{abstract}
+%
+%\begin{multicols}{2}
+%  \tableofcontents
+%\end{multicols}
+%
+%\section{Introduction}
+%
+% The \pkg{chemstyle} bundle consists of two parts. The first, 
+% the \pkg{chemstyle} package itself, aims to provide an easy and
+% reliable method to set up various document parameters (such as 
+% caption formatting), simply by specifying the model journal.  The 
+% package has also been designed to allow rapid addition of new journal
+% styles.  Each style definition is a separate file, and new styles can
+% be added very readily. The formatting system provided by 
+% \pkg{chemstyle} are intended for writing a variety of documents.  
+% Thus, the stylistic changes made by the package do not seek to 
+% reproduce the appearance of printed journal articles.  The package 
+% aims to be suitable for use in preparing drafts of papers, but also 
+% for writing reports, theses and so on.
+% 
+% The second part of the bundle is the \pkg{chemscheme} package, which
+% is loaded automatically by \pkg{chemstyle}. \pkg{chemscheme} 
+% undertakes two tasks. First, it provides a floating \texttt{scheme} 
+% environment, which acts in the same way as the kernel \texttt{figure}
+% and \texttt{table} floats. Secondly, it interfaces with either the
+% \pkg{chemcompounds} or \pkg{bpchem} packages to allow automatic
+% numbering of chemical compounds inside graphics.
+% 
+% This manual is written to cover both packages. All of the material
+% is relevant to users of the \pkg{chemstyle} package. For those only
+% using \pkg{chemscheme}, 
+%
+%\section{Installation}
+%
+% The entire bundle is supplied with the TDS-ready ZIP file,
+% \file{chemstyle.tds.zip}.  Simply unzip this into your local texmf
+% tree and run your hash program: \texttt{texhash} should work with
+% recent versions of either \TeX\ Live or MiK\TeX.
+%
+% To extract the bundle of files from \file{chemstyle.dtx}, run 
+% (pdf)\TeX\ on \file{chemstyle.dtx}. This will produce all of the 
+% package files, and also \file{README.txt}.  To extract the
+% files and build the documentation, run (pdf)\LaTeX\ on 
+% \texttt{chemstyle.dtx}: you will need to enable \enquote{write18} if 
+% you compile in PDF mode.
+%
+%\section{Requirements}
+%
+% The \pkg{chemstyle} class requires the following packages:
+%\begin{itemize}
+%  \item \pkg{amstext} (part of the AMS bundle);
+%  \item \pkg{caption};
+%  \item either \pkg{float} or \pkg{floatrow};
+%  \item \pkg{kvoptions} (part of the \pkg{oberdiek} bundle);
+%  \item either \pkg{siunitx} or \pkg{SIunits} (otherwise no 
+%    units are defined);
+%  \item \pkg{psfrag};
+%  \item \pkg{varioref} (part of the standard \pkg{tools} bundle):
+%    only loaded if not turned off;
+%  \item \pkg{xspace} (part of the standard \pkg{tools} bundle).
+%\end{itemize} 
+% These are normally present in the current major \TeX\ distributions,
+% but are also available from \href{http://www.ctan.org}{The 
+% Comprehensive TeX Archive Network}.
+% 
+%\DescribeOption{varioref}
+%\changes{v2.0a}{2009/08/23}{New \opt{varioref} option}
+% The option \opt{varioref} can be used to determine whether 
+% \pkg{chemstyle} loads the \pkg{varioref} package. For example,
+% users of \pkg{cleveref} will want to turn off loading of
+% \pkg{varioref} using:
+%\begin{LaTeXdemo}[code only]
+%  \usepackage[varioref=false]{chemstyle}
+%\end{LaTeXdemo} 
+% Users loading \pkg{hyperref} should note that if you want to use
+% \cs{autoref} then you should disable loading of \pkg{varioref}, to
+% avoid double labelling of float names!
+% 
+%\section{The \pkg{chemstyle} package: tools for chemistry}
+%
+% The package recognises a number of key--value options when loading.
+% Some of these are also available in the document body, and are 
+% described along with the relevant commands. Options which apply to
+% \pkg{chemscheme} can be given when loading \pkg{chemstyle} and will
+% be applied correctly.
+% 
+%\DescribeOption{journal}
+% \pkg{chemstyle} is supplied with a number of configuration files, 
+% based on the styles adopted by a number of chemistry journals 
+% (\ref{styles}). A style can be chosen by loading the package with 
+% the \opt{journal=\meta{style}} key.
+%\begin{table}
+%  \begin{tabular}{ll}
+%    \toprule
+%    Option & Journals using this style \\
+%    \midrule
+%    angew & \emph{Angew.\ Chem.}, \emph{Chem.\ Eur.\ J.} \\
+%    jomc & \emph{J.\ Organomet.\ Chem.},
+%      \emph{Coord.\ Chem.\ Rev.} \\
+%    ic & \emph{Inorg.\ Chem.} \\
+%    jacs & \emph{J.\ Am.\ Chem.\ Soc.} \\
+%    jcp & \emph{J.\ Phys.\ Chem.\ A}, \emph{J.\ Phys.\ Chem.\ B} \\
+%    orglett & \emph{Org.~Lett.}\\
+%    rsc & \emph{Chem.\ Commun.}, \emph{Org.\ Biomol.\ Chem.} \\
+%     & \emph{Dalton Trans.} \\
+%    tetlett & \emph{Tetrahedron}, \emph{Tetrahedron Lett.} \\
+%    \bottomrule
+%  \end{tabular}
+%  \caption{Styles provided by \pkg{chemstyle}}
+%  \label{styles}
+%\end{table}
+% 
+%\DescribeMacro{\cstsetup}
+% Many of the package options can be altered anywhere in the document, 
+% using the \cs{cstsetup} macro. This accepts a \pkg{keyval} list and 
+% processes it as needed.
+% 
+%\section{Naming of the references section}
+%
+% \pkg{chemstyle} alters the naming of the references section of a 
+% document. By default, \pkg{chemstyle} alters the value of \cs{bibname} 
+% or \cs{refname} (as appropriate) to the form of words chosen by the
+% target journal for the \enquote{References} section.
+%
+% The \enquote{\refname} naming commands are language-aware, \emph{via} the
+% \pkg{babel} interface.  Currently, \pkg{chemstyle} includes appropriate
+% labels for \pkg{babel} languages \opt{english}, \opt{german}, 
+% \opt{french} and \opt{italian}. Other languages can be added if appropriate
+% wordings are provided to the author. The naming system is designed to work 
+% correctly with both \pkg{natbib} and \pkg{biblatex}.
+%
+%\DescribeOption{notes}
+%\DescribeOption{nonotes}
+%\DescribeOption{notesbefore}
+% The package recognises the \opt{notes} option for controlling how
+% the references section is named.  The accepts the values
+% \opt{true}, \opt{false} and \opt{auto}.  The Boolean values either
+% enable or disable the addition of \enquote{Notes and} to the
+% \enquote{References} of the section title.  The \opt{auto} option works
+% in conjunction with the \pkg{notes2bib} package.  If notes are
+% added, \enquote{Notes and} is included in the section title, whereas if
+% no notes are given the section title remains as \enquote{References}.
+% The \opt{nonotes} option is equivalent to \opt{notes=false}.
+% The second option for this area is \opt{notesbefore}.  This takes
+% \opt{true} and \opt{false} only, and sets whether \enquote{Notes and
+% References} or \enquote{References and Notes} is produced.
+% 
+%\subsection{Additional units}
+%
+%\DescribeMacro{\cmc}
+%\DescribeMacro{\Hz}
+%\DescribeMacro{\molar}
+%\DescribeMacro{\Molar}
+%\DescribeMacro{\mmHg}
+% There are a few units which are useful for chemists that are not 
+% defined by the standard unit packages and are created here if 
+% necessary.
+%\begin{LaTeXdemo}
+%  \SI{10}{\cmc}   \\
+%  \SI{20}{\Hz}    \\
+%  \SI{30}{\molar} \\
+%  \SI{40}{\Molar} \\
+%  \SI{50}{\mmHg}  
+%\end{LaTeXdemo}
+%
+%\subsection{The standard state symbol}
+%
+%\DescribeMacro{\standardstate}
+% Related to the above, but not exactly a unit is the
+% \cs{standardstate} command.\footnote{The \cs{standardstate} macro
+% is only defined if the user does not have their own version.}  This
+% generates the tricky \cs{standardstate} symbol. The symbol will
+% adapt to local sizing.
+%\begin{LaTeXdemo}
+%  the standard conditions are indicated: \standardstate\\
+%  Common but not correct:
+%    $\Delta G_\mathrm{f}^\standardstate$ or
+%    $\Delta G_\mathrm{f}{}^\standardstate$  \\
+%  Better:
+%    $\Delta_\mathrm{f}G^\standardstate$ \\
+%  Sizing:
+%    $\int^{T_{\mathrm{out}}}_{T^\standardstate}$
+%\end{LaTeXdemo}
+% 
+%\subsection{Latin phrases}
+%
+%\DescribeMacro{\latin}
+%\DescribeMacro{\etc}
+%\DescribeMacro{\eg}
+%\DescribeMacro{\ie}
+%\DescribeMacro{\etal}
+%\DescribeMacro{\invacuo}
+% The various Latin phrases commonly used in chemistry are made
+% available as the obvious commands.  By altering the definition of
+% \cs{latin}, this allows ready switching from italic to Roman
+% typesetting.  Notice that \cs{etc}, \cs{ie} and \cs{eg} are aware
+% of trailing periods, and so doubling-up should not occur. 
+%\begin{LaTeXdemo}
+%  \latin{some text} \\
+%  \eg               \\
+%  \etal             \\
+%  \etc              \\
+%  \ie               \\
+%  \invacuo
+%\end{LaTeXdemo}
+%
+%\DescribeOption{abbremph}
+% The use of italic for these abbreviations is set by altering the
+% package option \opt{abbremph}, which takes values \opt{true} and
+% \opt{false}.
+%\begin{LaTeXdemo}
+%  \etal\ \ie \\
+%  \cstsetup{abbremph=false}
+%  \etal\ \ie \\
+%\end{LaTeXdemo}
+%
+%\DescribeOption{abbrcomma}
+% For American journals, where it is obligatory to follow \enquote{\eg} and
+% \enquote{\ie} with a comma, the package provides a mechanism for handling
+% this automatically.  Thus, when using an appropriate journal style,
+% |\eg|, |\eg.| and |\eg,| will all result in typesetting \enquote{\eg,}.
+% The Boolean package option \opt{abbrcomma} controls this.
+%\begin{LaTeXdemo}
+%  \eg this\\
+%  \cstsetup{abbrcomma=true}
+%  \ie that
+%\end{LaTeXdemo}
+%
+% The \cs{etc} and \cs{etal} commands are set up on the
+% assumption that they come at the end of a sentence.  Hence the
+% spacing after these will default to an inter-sentence space.  If
+% you desire an inter-word space, use the normal methods
+%\begin{LaTeXdemo}
+%  \etc\ more text \\
+%  \etal~have shown
+%\end{LaTeXdemo}
+%
+%\DescribeOption{phrases}
+%\DescribeOption{nophrases}
+% The definitions of all of the phrases are designed not to overwrite
+% any given by the user \emph{in the preamble}.  So, if you have your
+% own \cs{latin} macro, it will be used even if you load \pkg{chemstyle}. 
+% If you encounter any problems, try loading the package with the
+% \opt{nophrases} option; this option prevents the package even
+% trying to define any of the phrase macros. The \opt{phrases} option
+% acts as a complement to \opt{nopharses}, so that \opt{phrases=false}
+% is the same as \opt{nophrases=true}.
+% 
+%\subsection{Alkyl radicals}
+%
+%\DescribeMacro{\nPr}
+%\DescribeMacro{\iPr}
+%\DescribeMacro{\nBu}
+%\DescribeMacro{\iBu}
+%\DescribeMacro{\sBu}
+%\DescribeMacro{\tBu}
+% There are a few alkyl radicals that come up all of the time.  No
+% one seems to have put these into a package, so they are provided
+% here. As you would expect, \cs{iPr} gives \iPr, \cs{iBu} gives \iBu
+% and \cs{tBu} gives \tBu, and so on.  The style of the output
+% depends on the journal style specified; most journals seem to
+% favour one version of the abbreviation.
+%\begin{LaTeXdemo}
+%  The alkyl group could be   \\
+%  \nPr, \iPr or \nBu without \\
+%  affecting the selectivity.
+%\end{LaTeXdemo}
+% These should also work inside the \cs{ce} macro of \pkg{mhchem} when
+% if escaped mode:
+%\begin{LaTeXdemo}
+%  \ce{$\nBu$2CH-C($\iPr$)3}
+%\end{LaTeXdemo}
+%
+%\DescribeOption{rademph}
+%\DescribeOption{radhyphen}
+%\DescribeOption{radprefix}
+%\DescribeOption{radsuper}
+% The appearance of these radical abbreviations is controlled by the
+% package options \opt{rademph}, \opt{radhyphen}, \opt{radprefix} and
+% \opt{radsuper}.  The journal styles set these automatically, but
+% they can be redefined at any point.  The options work as might be
+% expected, and are Boolean switches.
+%\begin{LaTeXdemo}
+%  \cstsetup{
+%    radhyphen = false,
+%    radsuper = true}
+%  \iPr \tBu \\
+%  \cstsetup{
+%    radhyphen = true,
+%    radsuper  = false,
+%    radprefix = false,
+%    rademph   = false
+%  }
+%  \iBu \sBu
+%\end{LaTeXdemo}
+%
+%\DescribeOption{xspace}
+% The package can use \pkg{xspace} to automatically insert space after
+% the alkyl radical macros. This is controlled using the \opt{xspace}
+% option.
+%\begin{LaTeXdemo}
+%  \cstsetup{
+%    xspace = true
+%  }
+%  Some text \iPr some more text\\
+%  \cstsetup{
+%    xspace = false
+%  }
+%  Some text \iPr some more text
+%\end{LaTeXdemo}
+%
+%\section{The \pkg{chemscheme} package: graphics for chemistry}
+%
+%\subsection{Floating schemes}
+%
+% By default, \LaTeX\ defines two float types, \texttt{figure} and
+% \texttt{table}. Synthetic chemists make heavy use of schemes,
+% which need a \texttt{scheme} float type.  This is provided by
+% \pkg{chemscheme}, in a manner consistent with the kernel floats.
+% 
+%\DescribeEnv{scheme}
+% The package provides a new float type, scheme, accessed in the
+% usual way.
+%\begin{LaTeXdemo}[code and float]
+%  \begin{scheme}[ht]
+%    \includegraphics{scheme-one}
+%    \caption{A scheme with no compound numbers.}
+%  \end{scheme}
+%\end{LaTeXdemo}
+% The \texttt{scheme} float is designed to behave in the same way as the
+% standard \LaTeX\ float environments \texttt{figure} and 
+% \texttt{table}.  Thus schemes will be placed at the top of a page,
+% where possible. As shown in the example, the use of positional
+% modifiers is allowed. Labelling and referencing schemes also follows
+% the \LaTeX\ conventions.  \pkg{chemscheme} works hard to emulate the
+% document class in use, and so the exact behaviour will depend on 
+% whether the standard classes, \textsc{koma}-Script or \pkg{memoir} 
+% are being used.
+% 
+%\DescribeMacro{\schemename}
+% \cs{schemename} contains the text used in scheme captions (by
+% default \schemename).  This is used in the same manner as
+% \cs{figurename} or \cs{tablename} to set up the text used in scheme
+% captions.
+%\begin{LaTeXdemo}[code and float]
+%  \renewcommand*{\schemename}{Illustration}
+%  \begin{scheme}[ht]
+%    \includegraphics{scheme-one}
+%    \caption{A scheme that is not a Scheme!}
+%  \end{scheme}
+%\end{LaTeXdemo}
+% 
+%\DescribeMacro{\listofschemes}
+%\DescribeMacro{\listschemename}
+% To match the \cs{listoffigures} and \cs{listoftables} macros
+% provided by the \LaTeX\ kernel, \pkg{chemscheme} provides a
+% \cs{listofschemes} command.  This works in the same way as the
+% kernel commands, with the default text stored in the macro
+% \cs{listschemename}. The standard output is illustrated below.
+% \listofschemes
+% 
+%\DescribeOption{floats}
+% Which method is used to generate the new float is controlled by
+% the \opt{floats} option, which recognises \opt{float}, \opt{floatrow}
+% and \opt{memoir}. The \opt{memoir} option is ignored if not using
+% the \pkg{memoir} class, or if \pkg{chemstyle} is in 
+% use.\footnote{\pkg{memoir} is not capable of some of the float
+% manipulation needed by \pkg{chemstyle}.}
+%
+%\subsection{Reference numbers in graphics}
+%
+% There are a number of packages available for tracking compound 
+% reference numbers.  The two with the most up to date and
+% comprehensive features are \pkg{bpchem} and \pkg{chemcompounds}.
+% Both allow in-text numbering to be handled automatically.  However,
+% neither will allow the use of these numbers directly in schemes,
+% figures, \etc.  Both leave it to the user to manually adapt schemes
+% to match any changes in numbering.
+%
+% The \pkg{chemscheme} package provides a mechanism for rectifying this
+% issue.  The package makes use of the \pkg{psfrag} package, which
+% means that it can only directly produce DVI output (using \LaTeX).
+% However, direct PDF output using pdf\LaTeX\ is possible: see
+% Section~\ref{demo}. However, it \emph{will not work} with XeTeX
+% as the underlying \pkg{psfrag} package does not with XeTeX.
+% 
+% Getting automated numbers into schemes is a two step procedure. In
+% the first step, schemes (or other graphics) should be prepared as
+% normal and saved as encapsulated postscript (EPS) files. The most
+% popular chemistry drawing package, \textsc{ChemDraw}, is able to do
+% this from the \texttt{Save As \ldots} dialogue. The positions where 
+% the auto-labels should be have to be marked in the EPS file. The 
+% marker should consist of an \enquote{indicator} that the text is to be 
+% replaced, followed by a reference number or letter.  For automated 
+% substitution, the \enquote{indicator} text should be the same in all 
+% graphics.
+% 
+%\DescribeMacro{\schemeref}
+% In the second step, the command \cs{schemeref} is used to indicate
+% the mapping of the temporary markers to the automatically-managed
+% numbering. The syntax of the command is
+% \cs{chemschemeref}\oarg{temp-marker}\marg{label}, where
+% \meta{temp-marker} is the marker used in the graphic, and
+% \meta{label} is the name assigned to the compound by the user. By
+% default, \pkg{chemscheme} will assume that \meta{temp-marker} 
+% consists of the marker plus a number, beginning at 1 and 
+% incrementing by 1 for each additional structure inside one float. 
+% Each replacement requires a separate \cs{chemschemeref}, all of 
+% which should appear before the relevant \cs{includegraphics} command.
+% 
+% An example will make usage clearer. In the example used in this
+% document, the starting material is given label \texttt{IMesHCl} and
+% the product is called \texttt{IMes}.  As is shown in the next
+% example, in the EPS file these are labelled \textsf{TMP1} and
+% \textsf{TMP2}, respectively. The automated package defaults are
+% used.
+%\begin{LaTeXdemo}[code and float]
+%  \begin{scheme}[ht]
+%    \includegraphics{scheme-two}
+%    \caption{A scheme with temporary compound numbers.}
+%  \end{scheme}
+%  \begin{scheme}[ht]
+%    \schemeref{IMesHCl}
+%    \schemeref{IMes}
+%    \includegraphics{scheme-two}
+%    \caption{A scheme with automated compound numbers.}
+%  \end{scheme}
+%\end{LaTeXdemo}
+% If the marker text is given as an optional argument to
+% \cs{schemeref}, it must include the entire text to be matched.
+%\begin{LaTeXdemo}[code and float]
+%  \begin{scheme}[ht]
+%    \schemeref[TMP1]{IMesHCl}
+%    \schemeref[TMP2]{IMes}
+%    \includegraphics{scheme-two}
+%    \caption{A scheme with explicitly numbered temporary labels.}
+%  \end{scheme}
+%\end{LaTeXdemo}
+% Notice that the new label is centred on the middle of the temporary
+% marker, with the same baseline.  This should allow the user to
+% obtain good alignment of labels and structures.
+% 
+%\DescribeMacro{\schemerefmarker}
+% When using automatic substitution mode, the \enquote{marker} text to be
+% searched for is stored as \cs{schemerefmarker}, which has
+% default value \texttt{\schemerefmarker}. Thus the graphics should 
+% contain labels \textsf{\schemerefmarker1}, \textsf{\schemerefmarker2}, 
+% \emph{etc}. The value can be changed using \cs{renewcommand*}.
+% 
+%\DescribeMacro{\schemerefformat}
+% The format of chemical references is controlled by the underlying
+% package, \pkg{bpchem} or \pkg{chemcompounds}.  However, it is
+% useful to be able to specify additional formatting for schemes.  By
+% default, \pkg{chemscheme} formats all reference numbers in a sans 
+% serif font. This is controlled by \cs{schemerefformat}.
+%\begin{LaTeXdemo}[code and float]
+%  % This needs the color or xcolor package loaded
+%  \renewcommand*{\schemerefformat}{%
+%    \color{magenta}\textit
+%  }%  
+%  \begin{scheme}[ht]
+%    \schemeref{IMesHCl}
+%    \schemeref{IMes}
+%    \includegraphics{scheme-two}
+%    \caption{A scheme with altered label formatting.}
+%  \end{scheme}
+%\end{LaTeXdemo}
+%
+%\DescribeMacro{\schemerefsub}
+% The \pkg{bpchem} package allows tracking of sub-labels (\textbf{1a},
+% \textbf{1b}, \emph{etc.}).  To allow use of these in schemes, the
+% \cs{schemerefsub} command is provided.  This takes an additional
+% argument \marg{sub-label}, which is used to generate the
+% appropriate text.  When used with \pkg{chemcompounds}, this command
+% will gobble its arguments and issue a warning; no substitution will
+% take place.
+% 
+%\DescribeOption{tracking}
+% The choice of using \pkg{chemcompounds} or \pkg{bpchem} can be made
+% by giving the key--value option \opt{tracking=\meta{package}} when
+% loading \pkg{chemscheme}. This recognises the values \opt{bpchem}
+% and \opt{chemcompounds}, with the later as the default.
+%
+%\section{Horizontal positioning of all floats}
+%
+%\DescribeMacro{\floatcontentscentre}
+%\DescribeMacro{\floatcontentscenter}
+%\DescribeMacro{\floatcontentsleft}
+%\DescribeMacro{\floatcontentsright}
+% The \LaTeX\ default is to position all float contents flush-left.
+% There is no \enquote{hook} provided to alter this.  The \pkg{chemscheme}
+% package therefore provides commands to align all float contents
+% automatically.  As the macro names make clear,
+% \cs{floatcontentscentre} will make all floats centred (for users
+% speaking U.S.~English, the alternative spelling
+% \cs{floatcontentscenter} is also available).  The default behaviour
+% is restored using the command \cs{floatcontentsleft}. Finally,
+% \cs{floatcontentsright} is provided  for use if needed. Notice that
+% the float positioning commands should be given \emph{outside}
+% floating environments, and apply to all subsequent floats.
+%\begin{LaTeXdemo}[code and float]
+%  \floatcontentsleft
+%  \begin{scheme}[ht]
+%    \includegraphics{scheme-one}
+%    \caption{A flush-left scheme.}
+%  \end{scheme}
+%  \floatcontentsright
+%  \begin{scheme}[ht]
+%    \includegraphics{scheme-one}
+%    \caption{A flush-right scheme.}
+%  \end{scheme}
+%  \floatcontentscentre
+%\end{LaTeXdemo}
+%
+% It is important to note that the positioning mechanism used here
+% relies on a low-level hack of the \LaTeX\ kernel.  This has been
+% tested with the standard \LaTeX\ classes, the \pkg{memoir} class
+% and the \textsc{koma}-Script bundled.  Other document classes may
+% not give the desired behaviour.
+% 
+%\section{Some thoughts on generating chemical schemes}
+%
+%\subsection{Overview}
+% There are a number of ways of generating the graphical content of
+% schemes.  The choice of method will depend on what is available to
+% the user, and how complex the schemes desired are. In this section,
+% an overview of several approaches is given.\footnote{Thanks to
+% Norwid-R.\ Behrnd for suggesting this section and giving a number
+% of useful examples and tips.}  The package author, who is a
+% research worker in a university, favours using \textsc{ChemDraw} as
+% it is regarded by many synthetic chemists as the best tool for this
+% job.  However, this is clearly overkill for users requiring a
+% single diagram on a one-off basis. \textsc{ChemDraw} is also a
+% commercial package running only under Windows and MacOS X. The
+% following is necessarily somewhat brief and selective.  
+% 
+%\subsection{Macro-based methods}
+% At the most basic, a chemical scheme is simply a collection of
+% lines and symbols, as with any vector diagram.  Hence, it is
+% possible to construct schemes directly using packages such as
+% PSTricks or \pkg{pgf}/Ti\emph{k}z.  This is a complex method, and
+% cannot be recommended for anyone except the very experienced and
+% brave.
+%
+% At a more practical level, there are two packages available which
+% allow typesetting of chemical structures in \TeX, using
+% specialised commands: XyM\TeX\ and ppch\TeX.  Recent versions of
+% the XyM\TeX\ package have not been made available on \textsc{CTAN}, 
+% and the version held there is therefore considered to be obsolete.  
+% On the
+% other hand, the ppch\TeX\ system, developed originally for
+% Con\TeX{}t, is available. Both systems suffer from the lack of
+% chemical logic in the input: it is very hard to tell from the code
+% what is being represented. Drawing items such as \enquote{curly arrows},
+% or making subtle alterations to positioning, is very challenging in
+% purely macro-based systems.  For these reasons, it is usually much
+% more sensible to examine the available graphical methods.
+%
+%\subsection{Graphical methods}
+%
+% Moving to graphical systems, there is no reason that
+% general-purpose vector drawing packages cannot be used for schemes.
+% There are obviously several commercial (\textsc{CorelDraw},
+% \textsc{Adobe Illustrator}, \etc) and freeware (for example
+% the \textsc{gimp}) drawing packages that can be used in this way.
+% Simply rings and lines can easily be constructed, although in
+% general-purpose programs the user has to watch that all bonds
+% are the same length.
+%
+% For producing a large number of complex schemes, the particular
+% abilities of dedicated software become a necessity. As well as the
+% already-mentioned \textsc{ChemDraw}, programs such as \textsc{ISIS
+% Draw} and \textsc{ChemSketch} are available free for personal
+% use;\footnote{\enquote{Free} as in without charge, not as in open
+% source.} these programs are all Windows specific.  In the
+% open-source arena, there are a number of packages such as
+% \textsc{XDrawChem} and \textsc{BKchem}, which offer cross-platform
+% functionality.  The differences between the various packages are in
+% the ease of use, and ability to generate well-formatted output (for
+% example, aligning structures). A more recent addition to this 
+% group of packages is the cross-platform \textsc{ChemDoodle}, which
+% look promising but is not free in any sense.
+%
+% One which deserves mention for the \TeX\ user is TpX.  This is a
+% general purpose Windows graphics program specifically aimed at
+% producing \TeX-friendly output (such as PSTricks and Ti\emph{k}z
+% code) from a graphical interface. TpX can accept clipboard data
+% from other programs, so can be used to produce EPS files from
+% programs which do not have native export facilities (such as
+% \textsc{ISIS Draw}).
+% 
+%\section{Additional information}
+%
+%\subsection{Interactions with other packages}
+%
+% \pkg{chemstyle} and \pkg{chemscheme} are designed to avoid, as far as
+% possible, clashes with other packages.  The standard packages
+% \pkg{graphicx} and \pkg{varioref} are used by the bundle. If you 
+% need to load these with specific options, this needs to be done
+% \emph{before} loading \pkg{chemstyle} (or \pkg{chemscheme}). 
+%
+%\subsection{Captions above floats}
+%
+% The \texttt{scheme} float type is generated using either the
+% \pkg{float} or \pkg{floatrow} package. This has the side-effect
+% that the placement of captions for floats does not depended on
+% where the \cs{caption} command comes inside the floating
+% environment.\footnote{Normally this is a good thing.} If you wish
+% to alter the placement of captions, the mechanism of the underlying
+% package will be needed.  There are some subtle differences between
+% the two: although \pkg{floatrow} provides the \pkg{float} macros,
+% they are not all $100\,\%$ compatible.  This document is compiled 
+% using \pkg{floatrow}, and so to fix the position of captions the
+% following code is appropriate.
+%\begin{LaTeXdemo}[code and float]
+%  \begin{table}[ht]
+%    \fbox{First float contents}
+%    \caption{A caption below the float contents in the source.}
+%  \end{table}
+%  \floatsetup[table]{style=plain} 
+%  \begin{table}[ht]
+%    \fbox{Second float contents}
+%    \caption{A second caption below the float contents in the source.}
+%  \end{table}
+%\end{LaTeXdemo}
+% Using the \pkg{float} package, the same effect is achieved using:
+%\begin{LaTeXdemo}[code only]
+%  \begin{table}[ht]
+%    \fbox{First float contents}
+%    \caption{A caption below the float contents in the source.}
+%  \end{table}
+%  \floatstyle{plain}
+%  \restylefloat{table}
+%  \begin{table}[ht]
+%    \fbox{Second float contents}
+%    \caption{A second caption below the float contents in the source.}
+%  \end{table}
+%\end{LaTeXdemo}
+%
+%\section{A demonstration file\label{demo}}
+%
+% This is a simple demonstration file for using the \pkg{chemstyle}
+% package. By using the \pkg{auto-pst-pdf} package, it is possible to
+% use EPS graphics with pdf\LaTeX.
+%    \begin{macrocode}
+%<*demo>
+\documentclass[a4paper]{article}
+\usepackage[T1]{fontenc}            % Modern font encoding
+\usepackage[runs=2]{auto-pst-pdf}   % Use EPS graphics with pdfLaTeX
+\usepackage{booktabs}               % Better table layouts
+\usepackage[journal=rsc]{chemstyle} % Of course!
+\usepackage{geometry}               % Easy page layout
+\usepackage{lmodern}                % Use Latin Modern fonts
+\usepackage[version=3]{mhchem}      % Formula subscripts using \ce{}
+\begin{document}
+\end{document}
+%</demo>
+%    \end{macrocode}
+%
+%\StopEventually{^^A
+%  \PrintChanges
+%  \PrintIndex
+%}
+%
+%\section{Implementation}
+%
+% A few support packages.
+%    \begin{macrocode}
+%<*package> 
+\ProvidesPackage{chemstyle}
+  [2013/07/03 v2.0m Schemes and style for chemistry]   
+\RequirePackage{amstext,caption,chemscheme,xspace}
+\SetupKeyvalOptions{
+  family=cst,
+  prefix=cst@
+}
+%    \end{macrocode}
+%
+% Users of the \pkg{achemso} class should not load \pkg{chemstyle}.
+%    \begin{macrocode}
+\@ifclassloaded{achemso}
+  {
+    \PackageWarning{chemstyle}
+      {%
+        The chemstyle package should not\MessageBreak
+        be used with the achemso class:\MessageBreak
+        loading chemstyle will abort%
+      }
+    \endinput
+  }
+  {}
+%    \end{macrocode}
+%    
+%\begin{macro}{\cst@tempa}
+% A temporary macro.
+%    \begin{macrocode}
+\newcommand*\cst@tempa{}
+%    \end{macrocode}
+%\end{macro}    
+%    
+%\begin{macro}{\ifcst@abbrcomma}
+%\begin{macro}{\ifcst@abbremph}
+%\begin{macro}{\ifcst@notesbefore}
+%\begin{macro}{\ifcst@phrases}
+%\begin{macro}{\ifcst@rademph}
+%\begin{macro}{\ifcst@radhyphen}
+%\begin{macro}{\ifcst@radpreix}
+%\begin{macro}{\ifcst@radsuper}
+%\begin{macro}{\ifcst@varioref}
+%\begin{macro}{\ifcst@xspace}
+% Some simple Boolean options.
+%    \begin{macrocode}
+\DeclareBoolOption[false]{abbrcomma}
+\DeclareBoolOption[true]{abbremph}
+\DeclareBoolOption[true]{notesbefore}
+\DeclareBoolOption[true]{phrases}
+\DeclareComplementaryOption{nophrases}{phrases}
+\DeclareBoolOption[true]{rademph}
+\DeclareBoolOption[true]{radhyphen}
+\DeclareBoolOption[true]{radprefix}
+\DeclareBoolOption[false]{radsuper}
+\DeclareBoolOption[true]{varioref}
+\DeclareBoolOption[true]{xspace}
+%    \end{macrocode}
+%\end{macro} 
+%\end{macro} 
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@language}
+%\begin{macro}{\cst@journal}
+% Simple string options.
+%    \begin{macrocode}
+\DeclareStringOption{journal}
+\DeclareDefaultOption{%
+  \ifx\CurrentOptionValue\relax
+    \edef\cst@journal{\CurrentOptionKey}%
+  \else
+    \PackageWarning{chemstyle}{%
+      Unknown key option `\CurrentOptionKey'%
+    }%
+  \fi
+}
+\DeclareStringOption{language}
+\setkeys{cst}{%
+  journal  = ,
+  language = english,
+  varioref = true
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\ifcst@notes}
+%\begin{macro}{\ifcst@autonotes}
+%\begin{macro}{\cst@opt@auto}
+%\begin{macro}{\cst@opt@notestrue}
+%\begin{macro}{\cst@opt@notesfalse}
+%\begin{macro}{\cst@opt@notesauto}
+%\begin{macro}{\cst@opt@noteserror}
+% For the \opt{notes} option, there are three possible values. Some of
+% the internal code of \pkg{kvoptions} is borrowed and modified to keep
+% things simple.
+%    \begin{macrocode}
+\newif\ifcst@notes
+\newif\ifcst@autonotes
+\newcommand*\cst@opt@auto{auto}
+\define@key{cst}{notes}[true]{%
+  \edef\KVO@param{#1}%
+  \@onelevel@sanitize\KVO@param
+  \ifx\KVO@param\KVO@true
+    \expandafter\cst@opt@notestrue
+  \else
+    \ifx\KVO@param\KVO@false
+      \expandafter\expandafter\expandafter\cst@opt@notesfalse
+    \else
+      \ifx\KVO@param\cst@opt@auto
+        \expandafter\expandafter\expandafter\expandafter\expandafter
+        \expandafter\expandafter\cst@opt@notesauto
+      \else
+        \expandafter\expandafter\expandafter\expandafter\expandafter
+        \expandafter\expandafter\cst@opt@noteserror
+      \fi
+    \fi
+  \fi
+}
+\newcommand*\cst@opt@notestrue{%
+  \cst@notestrue
+  \cst@autonotesfalse
+}
+\newcommand*\cst@opt@notesfalse{%
+  \cst@notesfalse
+  \cst@autonotesfalse
+}
+\newcommand*\cst@opt@notesauto{%
+  \cst@notestrue
+  \cst@autonotestrue
+}
+\newcommand*\cst@opt@noteserror{%
+  \PackageWarning{chemstyle}{%
+    Value `\KVO@param' is not supported by\MessageBreak
+    option `notes'%
+  }%
+}
+\DeclareComplementaryOption{nonotes}{notes}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%    
+%\begin{macro}{\cstsetup}
+% For allowing run-time changes.
+%    \begin{macrocode}
+\newcommand*\cstsetup{%
+  \setkeys{cst}
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\cst@xspace}
+% A re-usable \cs{xspace}-based macro.
+%    \begin{macrocode}
+\newcommand*\cst@xspace{%
+  \ifcst@xspace
+    \expandafter\xspace
+  \fi
+}
+%    \end{macrocode}
+%\end{macro}
+%    
+%\subsection{Extra units}
+%
+%\begin{macro}{\cmc}
+%\begin{macro}{\Hz}
+%\begin{macro}{\cubiccentimeter}
+%\begin{macro}{\Molar}
+%\begin{macro}{\molar}
+%\begin{macro}{\mmHg}
+%\begin{macro}{\mol}
+%\changes{v2.0d}{2009/11/26}{Fix bug with \pkg{KOMA-Script}}
+% The units are provided if necessary.  
+%    \begin{macrocode}
+\@ifpackageloaded{siunitx}{%
+}{%
+  \@ifpackageloaded{SIunits}{}{%
+    \@ifpackageloaded{unitsdef}{}{%
+      \IfFileExists{siunitx.sty}{%
+        \RequirePackage{siunitx}
+      }{%
+        \IfFileExists{SIunits.sty}{%
+          \RequirePackage{SIunits}
+        }{%
+          \PackageWarning{chemstyle}{%
+            Could not find siunitx or SIunits package:\MessageBreak
+            additional units not defined%         
+          }
+        }
+      }
+    }
+  }
+}
+\@ifpackageloaded{siunitx}{%
+  \sisetup{load-configurations = abbreviations}
+  \DeclareSIUnit\cubiccentimeter{\cubic\centi\metre}
+  \DeclareSIUnit\cmc{\cubic\centi\metre}
+  \DeclareSIUnit\molar{\mole\per\cubic\deci\metre}
+  \DeclareSIUnit\Molar{\textsc{m}}
+  \DeclareSIUnit\torr{torr}
+  \sisetup{load-configurations = abbreviations}
+}{}
+\@ifpackageloaded{SIunits}{%
+  \newcommand*\cubiccentimeter{\centi\metre\cubed}
+  \newcommand*\Molar{\textsc{m}}
+  \newcommand*\molar{\mole\usk\deci\metre\rpcubed}
+  \newcommand*\mmHg{\milli\metre Hg}
+  \newcommand*\mol{\mole}
+  \newcommand*\cmc{\cubiccentimeter}
+  \newcommand*\Hz{\hertz}
+}{%
+  \@ifpackageloaded{unitsdef}{%
+    \newunit{\cubiccentimeter}{\cm\unitsuperscript{3}}
+    \newunit{\Molar}{\textsc{m}}
+    \newunit{\molar}{\mole\unitsep\dm\unitsuperscript{--3}}
+    \newunit{\mmHg}{mmHg}
+    \newunit{\mol}{\mole}
+    \newcommand*\cmc{\cubiccentimeter}
+    \newcommand*\Hz{\hertz}
+  }{}
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\subsection{Standard state symbol}
+%
+%\begin{macro}{\standardstate}
+%\begin{macro}{\cst@standardstate}
+%\begin{macro}{\cst@standardstate@aux}
+% The \enquote{standard state} symbol is handy. This definition is adapted 
+% from one posted several times to \texttt{comp.text.tex} by Donald 
+% Arseneau.
+%    \begin{macrocode}
+\providecommand*\standardstate{%
+  {%
+    \ensuremath{\protect\cst@standardstate}%
+  }%
+}
+\newcommand*\cst@standardstate{%
+  \mathpalette\cst@standardstate@aux\circ
+}
+\newcommand*\cst@standardstate@aux[2]{%
+  \ooalign{%
+    \hfil
+    $#1-$%
+    \hfil
+    \cr
+    \hfil
+    $#1#2$%
+    \hfil
+    \cr
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\subsection{Latin phrases}
+%
+%\begin{macro}{\latin}
+%\begin{macro}{\cst@latin}
+%\begin{macro}{\latinemphon}
+%\begin{macro}{\latinemphoff}
+% A series of Latin phrases are provided, with a quick switch to
+% print them in Roman letters if needed.  A mechanism is needed to
+% alter the effect of the \cs{latin} command \emph{only} if the user
+% does not have their own version.  This is achieved here, with
+% precautions taken to ensure the user can define their own
+% \cs{latin} command \emph{after} loading \pkg{chemstyle} and still have
+% everything work properly.
+%    \begin{macrocode}
+\newcommand*\cst@latin{%
+  \ifcst@abbremph
+    \expandafter\emph
+  \else
+    \expandafter\@firstofone
+  \fi
+}
+\newcommand*{\latinemphon}{%
+  \cstsetup{abbremph=true}%
+}
+\newcommand*{\latinemphoff}{%
+  \cstsetup{abbremph=false}%
+}
+\AtBeginDocument{%
+  \providecommand*\latin{\cst@latin}%
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@phrases@make}
+%\begin{macro}{\eg}
+%\begin{macro}{\etal}
+%\begin{macro}{\etc}
+%\begin{macro}{\ie}
+%\begin{macro}{\invacuo}
+% The outer functions for phrases are simple.
+%    \begin{macrocode}
+\newcommand*\cst@phrases@make{%
+  \providecommand*\etal{%
+    \cst@phrase{et~al}%
+  }%
+  \providecommand*\eg{%
+    \cst@phrase@comma{e.g\spacefactor999\relax}%
+  }%
+  \providecommand*\etc{%
+    \cst@phrase{etc}%
+  }%
+  \providecommand*\ie{%
+    \cst@phrase@comma{i.e\spacefactor999\relax}%
+  }%
+  \providecommand*\invacuo{%
+    \latin{in vacuo}%
+    \cst@xspace
+  }%
+}
+\AtBeginDocument{%
+  \ifcst@phrases
+    \expandafter\cst@phrases@make
+  \fi
+}
+%    \end{macrocode}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% \end{macro}
+% 
+%\begin{macro}{\cst@phrase}
+%\begin{macro}{\cst@phrase@comma}
+% For phrases which never have a comma, life is easy. If there may be a
+% comma to add, the flag is checked before proceeding.
+%    \begin{macrocode}
+\newcommand*\cst@phrase[1]{%
+  \latin{#1}%
+  \@ifnextchar.{}{%
+    .%
+    \cst@xspace
+  }%
+}
+\newcommand*\cst@phrase@comma{%
+  \ifcst@abbrcomma
+    \expandafter\cst@phrase@with@comma
+  \else
+    \expandafter\cst@phrase
+  \fi
+}
+%    \end{macrocode}
+%\end{macro} 
+%\end{macro}
+%\begin{macro}{\cst@phrase@with@comma}
+%\begin{macro}{\cst@phrase@with@comma@token}
+%\begin{macro}{\cst@phrase@with@comma@aux@i}
+%\begin{macro}{\cst@phrase@with@comma@aux@ii}
+%\begin{macro}{\cst@phrase@with@comma@end}
+%\begin{macro}{\cst@phrase@with@comma@next}
+% If a comma is needed, the macros here search through the trailing 
+% punctuation and gobble all of commas and full-stops. The appropriate
+% punctuation is then added. Notice that the \cs{relax} here is 
+% important, and that the test is category-code neural.
+%    \begin{macrocode}
+\newcommand*\cst@phrase@with@comma[1]{%
+  \latin{#1}%
+  \cst@phrase@with@comma@aux@i\relax
+}
+\newcommand*\cst@phrase@with@comma@token{}
+\newcommand*\cst@phrase@with@comma@aux@i[1]{%
+  \futurelet\cst@phrase@with@comma@token\cst@phrase@with@comma@aux@ii
+}
+\newcommand*\cst@phrase@with@comma@aux@ii{%
+  \let\cst@phrase@with@comma@next\cst@phrase@with@comma@aux@i
+  \if.\cst@phrase@with@comma@token\else
+    \if,\cst@phrase@with@comma@token\else
+      \let\cst@phrase@with@comma@next\cst@phrase@with@comma@end
+    \fi
+  \fi
+  \cst@phrase@with@comma@next
+}
+\newcommand*\cst@phrase@with@comma@end{%
+  .,%
+  \cst@xspace
+}
+\newcommand*\cst@phrase@with@comma@next{}
+%    \end{macrocode}
+%\end{macro} 
+%\end{macro} 
+%\end{macro}
+%\end{macro} 
+%\end{macro}
+%\end{macro}
+%
+%\subsection{Alkyl radicals}
+%
+%\begin{macro}{\cst@radical@make}
+% The \cs{cst@radical@amke} macro does the hard work of declaring each
+% abbreviation. The commands are made robust so they can (hopefully)
+% be used anywhere.
+%    \begin{macrocode}
+\newcommand*\cst@radical@make[2]{%
+  \expandafter\DeclareRobustCommand\expandafter*\csname #1#2\endcsname{%
+    \text{\cst@radical{#1}{#2}}%
+    \cst@xspace
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\nPr}
+%\begin{macro}{\iPr}
+%\begin{macro}{\nBu}
+%\begin{macro}{\iBu}
+%\begin{macro}{\sBu}
+%\begin{macro}{\tBu}
+% With a mechanism in place, the abbreviations are declared.  The
+% format of the resulting output will depend upon the configuration
+% file used.
+%    \begin{macrocode}
+\cst@radical@make{n}{Pr}
+\cst@radical@make{i}{Pr}
+\cst@radical@make{n}{Bu}
+\cst@radical@make{i}{Bu}
+\cst@radical@make{s}{Bu}
+\cst@radical@make{t}{Bu}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@radical@emph}
+%\begin{macro}{\cst@radical@hyphen}
+%\begin{macro}{\cst@radical@hyphen@false}
+%\begin{macro}{\cst@radical@super}
+% A few set up macros.
+%    \begin{macrocode}
+\newcommand*\cst@radical@emph{}
+\newcommand*\cst@radical@hyphen{}
+\newcommand*\cst@radical@hyphen@true{-}
+\newcommand*\cst@radical@super{}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@radical}
+%\begin{macro}{\cst@radical@pre}
+%\begin{macro}{\cst@radical@post}
+% The main body functions set everything up carefully, then actually
+% prints things.
+%    \begin{macrocode}
+\newcommand*\cst@radical{%
+  \let\cst@radical@emph\@firstofone
+  \ifcst@rademph
+    \let\cst@radical@emph\emph
+  \fi
+  \let\cst@radical@hyphen\relax
+  \ifcst@radhyphen
+    \let\cst@radical@hyphen\cst@radical@hyphen@true
+  \fi
+  \let\cst@radical@super\@firstofone
+  \ifcst@radsuper
+    \let\cst@radical@super\textsuperscript
+  \fi
+  \ifcst@radprefix
+    \expandafter\cst@radical@pre
+  \else
+    \expandafter\cst@radical@post
+  \fi
+}
+\newcommand*\cst@radical@pre[2]{%
+  \cst@radical@super{%
+    \cst@radical@emph{#1}%
+  }%
+  \cst@radical@hyphen
+  #2%
+}
+\newcommand*\cst@radical@post[2]{%
+  #2%
+  \cst@radical@hyphen
+  \cst@radical@super{%
+    \cst@radical@emph{#1}%
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+% \subsection{Handling reference section naming}
+%
+%\begin{macro}{bibnote}
+%\changes{v2.0h}{2010/04/13}{Only define bibnote counter if not done 
+%  elsewhere}
+% For the \opt{notes=auto} option, the \LaTeX\ counter \texttt{bibnote}
+% needs to be defined even if \pkg{notes2bib} is not loaded.
+%    \begin{macrocode}
+\AtBeginDocument{\@ifundefined{c@bibnote}{\newcounter{bibnote}}{}}
+%    \end{macrocode}
+%\end{macro}
+% 
+%\begin{macro}{\cst@refsec@name}
+%\begin{macro}{\cst@refsec@find}
+%\begin{macro}{\cst@refsec@find@aux}
+%\begin{macro}{\cst@refsec@set@name}
+% A search for the references section: if this ends up empty then there
+% is no section and later code will not do anything. This is used to
+% disable the relevant code if \opt{notes=false} is set.
+%    \begin{macrocode}
+\newcommand*\cst@refsec@name{}
+\newcommand*\cst@refsec@find[1]{%
+  \begingroup\expandafter\expandafter\expandafter\endgroup
+  \expandafter\ifx\csname #1\endcsname\relax
+    \expandafter\cst@refsec@set@name
+  \else
+    \expandafter\@gobble
+  \fi
+  {#1}%
+}
+\newcommand*\cst@refsec@set@name[1]{%
+  \def\cst@refsec@name{#1}%
+}
+\cst@refsec@find{bibname}%
+\cst@refsec@find{refname}%
+\ifx\cst@refsec@name\@empty
+  \expandafter\cst@notesfalse
+\fi
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@refsec@lang}
+% \changes{v2.0m}{2013/07/03}{Add phrase translations for Italian}
+%\begin{macro}{\cst@refsec@lang@clist}
+%\begin{macro}{\cst@refsec@lang@define}
+% The language-dependent definitions are created.
+%    \begin{macrocode}
+\newcommand*\cst@refsec@lang{}
+\newcommand*\cst@refsec@lang@clist{}
+\newcommand*\cst@refsec@lang@define[4]{%
+  \ifx\cst@refsec@lang@clist\@empty
+    \def\cst@refsec@lang@clist{#1}%
+  \else
+    \edef\cst@refsec@lang@clist{%
+      \cst@refsec@lang@clist
+      ,#1%
+    }%
+  \fi
+  \@namedef{cst@refsec@lang@#1@references}{#2}%
+  \@namedef{cst@refsec@lang@#1@and}{#3}%
+  \@namedef{cst@refsec@lang@#1@notes}{#4}%
+}
+\cst@refsec@lang@define{english}{References}{and}{Notes}
+\cst@refsec@lang@define{UKenglish}{References}{and}{Notes}
+\cst@refsec@lang@define{ngerman}{Literatur}{und}{Notizen}
+\cst@refsec@lang@define{german}{Literatur}{und}{Notizen}
+\cst@refsec@lang@define{french}{R\'ef\'erences}{et}{Notes}
+\cst@refsec@lang@define{frenchb}{R\'ef\'erences}{et}{Notes}
+\cst@refsec@lang@define{italian}{Bibliografia}{e}{Note}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@refsec@set}
+%\begin{macro}{\cst@refsec@set@biblatex}
+%\begin{macro}{\cst@refsec@set@babel}
+%\begin{macro}{\cst@refsec@set@language}
+% The method for setting up the section heading depends on the 
+% other packages in use. \pkg{biblatex} has its own system, and with
+% \pkg{babel} there is also a mechanism to attach to.
+%    \begin{macrocode}
+\ifcst@notes
+  \AtBeginDocument{\cst@refsec@set}
+\fi
+\newcommand*\cst@refsec@set{%
+  \@ifpackageloded{biblatex}{%
+    \@for\cst@refsec@lang:=\cst@refsec@lang@clist\do{%
+      \cst@refsec@set@biblatex\cst@refsec@lang
+    }%
+  }{%
+    \@ifpackageloded{babel}{%
+      \@for\cst@refsec@lang:=\cst@refsec@lang@clist\do{%
+        \cst@refsec@set@babel\cst@refsec@lang
+      }%
+      \expandafter\selectlanguage\expandafter{\languagename}%
+    }{%
+      \@for\cst@refsec@lang:=\cst@refsec@lang@clist\do{%
+        \cst@refsec@set@language\cst@refsec@lang
+      }%
+    }%
+  }
+}
+\newcommand*\cst@refsec@set@biblatex[1]{%
+  \edef\cst@tempa{%
+    \noexpand\csgappto{bib@strings@#1}{%
+      \noexpand\def\expandafter\noexpand
+        \csname\cst@refsec@name\endcsname{%
+        \noexpand\cst@refsec@make@name{#1}%
+      }%
+    }%
+  }%
+  \cst@tempa
+}
+\newcommand*\cst@refsec@set@babel[1]{%
+  \edef\cst@tempa{%
+    \noexpand\addto{\expandafter\noexpand\csname captions#1\endcsname}{%
+      \noexpand\def\expandafter\noexpand
+        \csname\cst@refsec@name\endcsname{%
+        \noexpand\cst@refsec@make@name{#1}%
+      }%
+    }%
+  }%
+  \cst@tempa
+}
+\newcommand*\cst@refsec@set@language[1]{%
+  \ifx#1\cst@language
+    \edef\cst@tempa{%
+      \noexpand\def\expandafter\noexpand
+        \csname\cst@refsec@name\endcsname{%
+        \noexpand\cst@refsec@make@name{#1}%
+      }%
+    }%
+    \cst@tempa
+  \fi
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%    
+%\begin{macro}{\cst@refsec@make@name}
+%\begin{macro}{\cst@refsec@make@name@fixed}
+%\begin{macro}{\cst@refsec@make@name@auto}
+%\begin{macro}{\cst@refsec@make@name@nonotes}
+% Actually making the name is pretty easy: the only complexity is
+% the possibility of automation.
+%    \begin{macrocode}
+\newcommand*\cst@refsec@make@name@fixed[1]{%
+  \ifcst@notesbefore
+    \@nameuse{cst@refsec@lang@#1@notes}
+    \@nameuse{cst@refsec@lang@#1@and}
+    \@nameuse{cst@refsec@lang@#1@references}%
+  \else
+    \@nameuse{cst@refsec@lang@#1@references}
+    \@nameuse{cst@refsec@lang@#1@and}
+    \@nameuse{cst@refsec@lang@#1@notes}%
+  \fi
+}
+\newcommand*\cst@refsec@make@name@auto{%
+  \ifnum\the\value{bibnote}>\z@\relax
+    \expandafter\cst@refsec@make@name@fixed
+  \else
+    \expandafter\cst@refsec@make@name@nonotes
+  \fi
+}
+\newcommand*\cst@refsec@make@name@nonotes[1]{%
+  \@nameuse{cst@refsec@lang@#1@references}%
+}
+\let\cst@refsec@make@name\cst@refsec@make@name@fixed
+\ifcst@notes
+  \ifcst@autonotes
+    \let\cst@refsec@make@name\cst@refsec@make@name@auto
+  \fi
+\fi
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+% With everything set up, options can be processed.
+%    \begin{macrocode}
+\ProcessKeyvalOptions{cst}
+%    \end{macrocode}
+%    
+%\subsection{Cross-references}
+%
+% The naming for cross-references is sorted out properly using the
+% \pkg{varioref} package. Schemes are done at the start of the document
+% as the definition of \cs{schemename} may not exist yet.
+%    \begin{macrocode}
+\ifcst@varioref
+  \RequirePackage{varioref}
+  \labelformat{figure}{\figurename~#1}
+  \labelformat{table}{\tablename~#1}
+  \AtEndOfPackage{%
+    \AtBeginDocument{%
+      \labelformat{scheme}{\schemename~#1}%
+    }%
+  }
+\fi
+%    \end{macrocode}
+%    
+%\subsection{Float formatting}
+%
+%\begin{macro}{\cst@float@memoir@correct}
+% Floats are now re-formatted, using the tools provided by either
+% \pkg{float} or \pkg{floatrow}. First, a check to make sure that
+% \pkg{chemscheme} was not loaded with the \opt{memoir} option. The
+% checks there mean that this is only possible if neither \pkg{floatrow}
+% nor \pkg{float} are already loaded.
+%    \begin{macrocode}
+\newcommand*\cst@float@memoir@correct{%
+  \let\newfloat\@undefined
+}
+\ifx\cst@float@pkg\cst@opt@memoir
+  \expandafter\cst@float@memoir@correct
+\fi
+\cst@float@load
+\cst@float@execute{\@nameuse{cst@float@make@\cst@float@pkg}}
+%    \end{macrocode} 
+%\end{macro} 
+%
+% With that done, the package can safely re-define appearance.
+%    \begin{macrocode}
+\@ifpackageloaded{floatrow}{%
+  \floatsetup{objectset=centering}
+  \floatplacement{figure}{htbp}
+  \floatplacement{scheme}{htbp}
+  \floatplacement{table}{htbp}
+  \floatsetup[table]{style=plaintop}
+}{%
+  \floatstyle{plaintop}
+  \restylefloat{table}
+  \floatstyle{plain}
+  \restylefloat{figure}
+  \floatplacement{table}{htbp}
+  \floatplacement{figure}{htbp}
+  \AtBeginDocument{%
+    \restylefloat{scheme}
+    \floatplacement{scheme}{htbp}
+  }
+}
+%    \end{macrocode}
+%    
+%\subsection{Loading the style definition}
+%
+% The style definition is loaded here, once everything necessary is
+% in place. 
+%    \begin{macrocode}
+\ifx\cst@journal\@empty\else
+  \InputIfFileExists{\cst@journal.chemstyle.cfg}{%
+    \setkeys{cst}{
+      abbrcomma   = false,
+      abbremph    = true,
+      notesbefore = true,
+      rademph     = true,
+      radhyphen   = true,
+      radprefix   = true,
+      radsuper    = false,
+    }
+  }{%
+    \PackageWarning{chemstyle}{%
+      Requested style `\cst@journal' does not exist\MessageBreak
+    }
+  }
+\fi
+%    \end{macrocode}
+%
+% All done for \pkg{chemstyle}. 
+%    \begin{macrocode}
+\cst@ref@load
+%</package> 
+%    \end{macrocode}  
+%
+%\subsection{The \pkg{chemscheme} package}
+%
+%\subsubsection{Making new floats}
+% 
+% The code for making floats is stored in the \pkg{chemscheme} package:
+% in this way there should be no issues with loading things in any 
+% order.
+%    \begin{macrocode}
+%<*chemscheme>
+\ProvidesPackage{chemscheme}
+  [2013/07/03 v2.0m Schemes for chemistry] 
+\RequirePackage{kvoptions,psfrag}
+\SetupKeyvalOptions{
+  family=cst,
+  prefix=cst@
+}
+%    \end{macrocode}
+%
+% There is a lot of confusion about XeTeX: hopefully a warning will
+% sort this.    
+%    \begin{macrocode}
+\begingroup\expandafter\expandafter\expandafter\endgroup
+\expandafter\ifx\csname XeTeXrevision\endcsname\relax
+\else
+  \PackageWarning{chemscheme}
+    {XeTeX in use: \string\schemeref\space will not work}
+\fi
+%    \end{macrocode}
+%    
+% Users of the \pkg{achemso} class should not load \pkg{chemscheme}.
+%    \begin{macrocode}
+\@ifclassloaded{achemso}
+  {
+    \PackageWarning{chemscheme}
+      {%
+        The chemscheme package should not\MessageBreak
+        be used with the achemso class:\MessageBreak
+        loading chemscheme will abort%
+      }
+    \endinput
+  }
+  {}
+%    \end{macrocode}
+% 
+%\begin{macro}{\ifcst@floatrow} 
+%\begin{macro}{\ifcst@chemcompounds} 
+% Some simple Boolean options.
+%    \begin{macrocode}
+\DeclareBoolOption[true]{chemcompounds}
+\DeclareComplementaryOption{bpchem}{chemcompounds}
+\DeclareBoolOption[true]{floatrow}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@opt@bpchem}
+%\begin{macro}{\cst@opt@chemcompounds}
+%\begin{macro}{\cst@opt@ref@error}
+% The \opt{tracking} option has two possible values.
+%    \begin{macrocode}
+\define@key{cst}{tracking}[chemcompounds]{%
+  \edef\KVO@param{#1}%
+  \@onelevel@sanitize\KVO@param
+  \ifx\KVO@param\cst@opt@bpchem
+    \expandafter\cst@chemcompoundsfalse
+  \else
+    \ifx\KVO@param\cst@opt@chemcompounds
+      \expandafter\expandafter\expandafter\cst@chemcompoundstrue
+    \else
+      \expandafter\expandafter\expandafter\cst@opt@ref@error
+    \fi
+  \fi
+}
+\newcommand*\cst@opt@bpchem{bpchem}
+\@onelevel@sanitize\cst@opt@bpchem
+\newcommand*\cst@opt@chemcompounds{chemcompounds}
+\@onelevel@sanitize\cst@opt@chemcompounds
+\newcommand*\cst@opt@ref@error{%
+  \PackageWarning{chemscheme}{%
+    Value `\KVO@param' is not supported by\MessageBreak
+    option `tracking'%
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\ifcst@memoir}
+%\begin{macro}{\cst@opt@float}
+%\begin{macro}{\cst@opt@floatrow}
+%\begin{macro}{\cst@opt@memoir}
+%\begin{macro}{\cst@opt@floats@error}
+% For \opt{floats}, the number of choices is slightly higher.
+%    \begin{macrocode}
+\newif\ifcst@memoir
+\define@key{cst}{floats}{%
+  \edef\KVO@param{#1}%
+  \cst@floatrowtrue
+  \cst@memoirfalse
+  \ifx\KVO@param\cst@opt@float
+    \expandafter\cst@floatrowfalse
+  \else
+    \ifx\KVO@param\cst@opt@floatrow\else
+      \ifx\KVO@param\cst@opt@memoir
+        \expandafter\expandafter\expandafter\expandafter
+        \expandafter\expandafter\expandafter\cst@memoirtrue
+      \else        
+        \expandafter\expandafter\expandafter\expandafter
+        \expandafter\expandafter\expandafter\cst@opt@floats@error
+      \fi
+    \fi
+  \fi
+}
+\newcommand*\cst@opt@float{float}
+\newcommand*\cst@opt@floatrow{floatrow}
+\newcommand*\cst@opt@memoir{memoir}
+\newcommand*\cst@opt@floats@error{%
+  \PackageWarning{chemscheme}{%
+    Value `\KVO@param' is not supported by\MessageBreak
+    option `floats'%
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{environment}{scheme}
+%\begin{macro}{\cst@float@pkg}
+%\begin{macro}{\cst@float@execute}
+%\begin{macro}{\cst@float@load}
+%\begin{macro}{\cst@float@load@float}
+%\begin{macro}{\cst@float@load@floatrow}
+% With options processed, the appropriate packages can be loaded as
+% necessary. The are some checks so that only one package is tried. 
+%    \begin{macrocode}
+\newcommand*\cst@float@pkg{}
+\newcommand*\cst@float@execute{}
+\newcommand*\cst@float@load{%
+  \IfFileExists{floatrow.sty}{}{%
+    \ifcst@floatrow
+      \expandafter\cst@floatrowfalse
+    \fi
+  }%
+  \ifcst@floatrow
+    \expandafter\cst@float@load@floatrow
+  \else
+    \expandafter\cst@float@load@float
+  \fi
+}
+\newcommand*\cst@float@load@float{%
+  \RequirePackage{float}
+  \def\cst@float@pkg{float}
+  \def\cst@float@execute{\AtBeginDocument}
+}
+\newcommand*\cst@float@load@floatrow{%
+  \RequirePackage{floatrow}
+  \def\cst@float@pkg{floatrow}
+  \def\cst@float@execute{\@firstofone}
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@float@chapter}
+%\begin{macro}{\cst@float@chapter@hook}
+% A method to add to the \cs{@chapter} macro is needed.  This is
+% not compatible with \cs{g@addto@macro} directly, so a more
+% complex method is used by providing a suitable hook.
+%    \begin{macrocode}
+\newcommand*\cst@float@chapter@hook{}
+\newcommand*\cst@float@chapter{}
+\ifx\@chapter\@undefined\else
+  \let\cst@float@chapter\@chapter
+  \def\@chapter{%
+    \cst@float@chapter@hook
+    \cst@float@chapter
+  }
+\fi
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@float@chapter@fix}
+% So that floats inside chapters work correctly.
+%    \begin{macrocode}
+\newcommand*\cst@float@chapter@fix{%
+  \g@addto@macro{\cst@float@chapter@hook}{%
+    \addtocontents{los}{\protect\addvspace{10\p@}}%
+  }%
+  \begingroup\expandafter\expandafter\expandafter\endgroup
+  \expandafter\ifx\csname KOMAScriptVersion\endcsname\relax
+    \@namedef{thescheme}{%
+      \ifnum\c@chapter>\z@\relax
+        \thechapter.%
+      \fi 
+      \arabic{scheme}%
+    }%
+  \fi
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\cst@float@make@float}
+% When using \pkg{float}, definition depends on the existence of
+% chapters. The name and \enquote{list of} macros are then created separately.
+%    \begin{macrocode}
+\newcommand*\cst@float@make@float{%
+  \begingroup\expandafter\expandafter\expandafter\endgroup
+  \expandafter\ifx\csname chapter\endcsname\relax
+    \newfloat{scheme}{tbp}{los}%
+  \else
+    \newfloat{scheme}{tbp}{los}[chapter]%
+    \expandafter\cst@float@chapter@fix
+  \fi
+  \floatname{scheme}{\schemename}%
+  \newcommand*\listofschemes{%
+    \listof{scheme}{\listschemename}%
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%\begin{macro}{\cst@float@make@floatrow}
+% For \pkg{floatrow}, the interface to everything is rather simple.
+%    \begin{macrocode}
+\newcommand*\cst@float@make@floatrow{%
+  \begingroup\expandafter\expandafter\expandafter\endgroup
+  \expandafter\ifx\csname chapter\endcsname\relax
+    \DeclareNewFloatType{scheme}{%
+      fileext   = los,
+      placement = tbp,
+      name      = Scheme
+    }%
+  \else
+    \DeclareNewFloatType{scheme}{%
+      fileext   = los,
+      placement = tbp,
+      name      = Scheme, 
+      within    = chapter
+    }%
+    \cst@float@chapter@fix
+  \fi
+  \newcommand*\listofschemes{%
+    \listof{scheme}{\listschemename}%
+  }%
+}
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\cst@float@make@memoir}
+% \pkg{memoir} has a lot of things to set up for a float. This list is
+% essentially the same as the \pkg{memoir} kernel uses.
+%    \begin{macrocode}
+\newcommand*\cst@float@make@memoir{%
+  \newfloat[chapter]{scheme}{los}{\schemename}%
+  \newlistof{listofschemes}{los}{\listschemename}%
+  \addtodef{\@smemfront}{}{\counterwithout{scheme}{chapter}}%
+  \addtodef{\@smemmain}{}{%
+    \ifartopt\else
+      \counterwithin{scheme}{chapter}%
+    \fi
+  }%
+  \addtodef{\backmatter}{}{%
+    \ifartopt\else
+      \counterwithout{scheme}{chapter}%
+      \setcounter{scheme}{0}%
+    \fi
+  }%
+  \newlistentry[chapter]{scheme}{los}{0}%
+  \cftsetindents{scheme}{0em}{2.3em}%
+  \addtodef{\insertchapterspace}{}{%
+    \addtocontents{los}{\protect\addvspace{10pt}}%
+  }%
+  \ifartopt
+    \counterwithout{scheme}{chapter}%
+  \fi
+}
+%    \end{macrocode}
+%\end{macro}
+%
+% Options are set.
+%    \begin{macrocode}
+\ProcessKeyvalOptions{cst}
+%    \end{macrocode}
+%    
+% Everything is set up, and so the support can finally be loaded.
+%    \begin{macrocode}
+\@ifpackageloaded{floatrow}{%
+  \def\cst@float@pkg{floatrow}
+  \def\cst@float@execute{\@firstofone}
+}{%
+  \@ifpackageloaded{float}{%
+    \def\cst@float@pkg{float}
+    \def\cst@float@execute{\AtBeginDocument}
+  }{%
+    \@ifclassloaded{memoir}{%
+      \def\cst@float@pkg{memoir}
+      \def\cst@float@execute{\AtBeginDocument}
+    }{%
+      \@ifpackageloaded{chemstyle}{}{%
+        \cst@float@load
+      }%
+    }%
+  }%
+}
+%    \end{macrocode}
+%\changes{v2.0b}{2009/10/26}{logic for undefining \cs{newfloat} 
+%  corrected}
+% If \pkg{memoir} is in use, delete the \cs{newfloat} macro.
+%    \begin{macrocode}
+\ifx\cst@float@pkg\cst@opt@memoir
+  \let\newfloat\@undefined
+\fi
+\@ifpackageloaded{chemstyle}{}{%
+  \cst@float@execute{\@nameuse{cst@float@make@\cst@float@pkg}}
+}
+%    \end{macrocode}
+%\end{environment}
+%    
+%\subsubsection{Supporting \pkg{babel} for schemes}
+%
+%\begin{macro}{\schemename}
+%\begin{macro}{\listschemename}
+% To start, the names in English.
+%    \begin{macrocode}
+\@ifpackageloaded{floatrow}{}{%
+  \newcommand*\schemename{Scheme}
+}
+\newcommand*\listschemename{List of Schemes}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%
+%\changes{v2.0j}{2010/11/04}{Include \texttt{ngerman} in \pkg{babel}
+%  support}
+% \changes{v2.0m}{2013/07/03}{Add phrase translations for Italian}
+% Some simple label changes.
+%    \begin{macrocode}
+\AtBeginDocument{%
+  \@ifpackageloaded{babel}{%
+    \addto{\captionsfrench}{%
+      \def\listschemename{Table des sch\`emes}%
+      \def\schemename{{\scshape Sch\`eme}}%
+    }%
+    \addto{\captionsgerman}{%
+      \def\listschemename{Schemenverzeichnis}%
+      \def\schemename{Schema}%
+    }%
+    \addto{\captionsngerman}{%
+      \def\listschemename{Schemenverzeichnis}%
+      \def\schemename{Schema}%
+    }%
+    \addto{\captionsitalian}{%
+      \def\listschemename{Lista degli schemi}%
+      \def\schemename{Schema}%
+    }%
+    \expandafter\selectlanguage\expandafter{\languagename}%
+  }{}%
+}
+%    \end{macrocode}
+%    
+%\subsubsection{Positioning float contents}
+%
+%\begin{macro}{\floatcontentscentre}
+%\begin{macro}{\floatcontentscenter}
+%\begin{macro}{\floatcontentsleft}
+%\begin{macro}{\floatcontentsright}
+% When using \pkg{floatrow}, centring all floats is easy.  This is
+% not the case for other methods, and so some macros are provided.
+% The definitions depend on whether \pkg{floatrow} is in use.
+%    \begin{macrocode}
+\@ifpackageloaded{floatrow}{%
+  \newcommand*\floatcontentscentre{%
+    \floatsetup{objectset=centering}%
+  }
+  \newcommand*\floatcontentscenter{%
+    \floatsetup{objectset=centering}%
+  }
+  \newcommand*\floatcontentsright{%
+    \floatsetup{objectset=raggedleft}%
+  }
+  \newcommand*\floatcontentsleft{%
+    \floatsetup{objectset=raggedright}%
+  }
+}{%
+%    \end{macrocode}
+%\begin{macro}{\cst@floatboxreset}
+%\begin{macro}{\@floatboxreset}
+%\begin{macro}{\cst@everyfloat}
+% When \pkg{floatrow} is not in use, then a low-level hack of
+% \cs{@floatboxtreset} is used.
+%    \begin{macrocode}
+  \newcommand*\cst@floatboxreset{}
+  \newcommand*\cst@everyfloat{}
+  \let\cst@floatboxreset\@floatboxreset
+  \def\@floatboxreset{%
+    \cst@everyfloat
+    \cst@floatboxreset
+  }
+  \newcommand*{\floatcontentscentre}{%
+    \let\cst@everyfloat\centering
+  }
+  \newcommand*{\floatcontentscenter}{%
+    \let\cst@everyfloat\centering
+  }
+  \newcommand*{\floatcontentsleft}{%
+    \let\cst@everyfloat\relax
+  }
+  \newcommand*{\floatcontentsright}{%
+    \let\cst@everyfloat\raggedleft
+  }
+}
+\floatcontentsleft
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+%\subsubsection{Reference numbers in graphics}
+%
+%\begin{macro}{\schemerefmarker}
+%\begin{macro}{\schemerefformat}
+% The two macros \cs{schemerefmarker} and \cs{schemerefformat}
+% are used to allow customisation of the behaviour of the package.
+% Here defaults are provided.
+%    \begin{macrocode}
+\newcommand*\schemerefmarker{TMP}
+\newcommand*\schemerefformat{\textsf}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\cst@ref@count}
+% The automatic numbering system needs a counter.
+%    \begin{macrocode}
+\newcount\cst@ref@count
+%    \end{macrocode}
+%\end{macro}
+%
+%\begin{macro}{\cst@ref@label}
+%\begin{macro}{\cst@ref@load}
+% The loading of support packages is set up as a macro, so that it can
+% be delayed when \pkg{chemstyle} is in use.
+%    \begin{macrocode}
+\newcommand*\cst@ref@label{}
+\newcommand*\cst@ref@load{%
+  \ifcst@chemcompounds
+    \RequirePackage{chemcompounds}
+    \let\cst@ref@label\compound
+  \else
+    \RequirePackage{bpchem}
+    \let\cst@ref@label\CNlabel
+  \fi
+}
+\@ifpackageloaded{chemstyle}{}{%
+  \cst@ref@load
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\schemeref}
+%\begin{macro}{\chemschemeref}
+% The main function is quite simple: just set up the substitution then
+% hand over to \pkg{psfrag}. There is also some back-compatibility code
+% for early versions of the package.
+%    \begin{macrocode}
+\DeclareRobustCommand*\schemeref[2]
+  [\schemerefmarker\the\cst@ref@count]{%
+  \advance\cst@ref@count\@ne\relax
+  \psfrag{#1}[b][b]{%
+    \schemerefformat{\cst@ref@label{#2}}%
+  }%
+}
+\DeclareRobustCommand*\chemschemeref[1]{%
+  \schemeref[#1]%
+}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%
+%\begin{macro}{\schemerefsub}
+%\begin{macro}{\chemschemerefsub}
+%\begin{macro}{\cst@ref@check@sub}
+% Sub-referencing is only available with \pkg{bpchem}: other than that,
+% very similar to above.
+%    \begin{macrocode}
+\DeclareRobustCommand*\schemerefsub[3]
+  [\schemerefmarker\the\cst@ref@count]{%
+  \advance\cst@ref@count\@ne\relax
+  \psfrag{#1}[b][b]{%
+    \schemerefformat{\CNlabelsub{#2}{#3}}%
+  }%
+}
+\DeclareRobustCommand*\chemschemerefsub[1]{%
+  \schemerefsub[#1]%
+}
+\newcommand*\cst@ref@check@sub{%
+  \@ifpackageloaded{bpchem}{}{%
+    \def\schemerefsub[3][]{%
+      \PackageWarning{chemscheme}{%
+        \string\schemerefsub\space not available unless bpchem
+        \MessageBreak package is loaded
+      }%
+    }%
+  }%
+}
+\AtBeginDocument{\cst@ref@check@sub}
+%    \end{macrocode}
+%\end{macro}
+%\end{macro}
+%\end{macro}
+%
+% That ends the \pkg{chemscheme} package.
+%    \begin{macrocode}
+%</chemscheme>
+%    \end{macrocode}
+%    
+%\subsection{Journal definition files}
+%
+% The journal files are all rather similar. They set a series of keys
+% and perhaps make other changes.
+% 
+%\subsubsection{\emph{Angew.\ Chem.}\ style}
+%
+%    \begin{macrocode}
+%<*angew>    
+\ProvidesFile{angew.chemstyle.cfg}
+  [2013/07/03 v2.0m Angew. Chem. journal style]
+\setkeys{cst}{
+  abbremph  = false,
+  radhyphen = false
+}
+\captionsetup{
+  font            = sf,
+  labelfont       = {bf,it},
+  labelsep        = period,
+  singlelinecheck = off
+}
+\captionsetup[table]{
+  labelsep = colon
+}
+%</angew>
+%    \end{macrocode}
+%    
+%\subsubsection{\emph{Inorg.\ Chem.}\ style}
+%
+%    \begin{macrocode}
+%<*ic>    
+\ProvidesFile{ic.chemstyle.cfg}
+  [2013/07/03 v2.0m Inorg. Chem. journal style]
+\DeclareCaptionLabelSeparator{perquad}{.\quad}
+\captionsetup{
+  labelfont       = {bf,it,sf},
+  labelsep        = perquad,
+  singlelinecheck = off
+  textfont        = rm
+}
+\captionsetup[figure]{
+  textfont = rm
+}
+\setkeys{cst}{
+  abbrcomma   = true,
+  abbremph    = false,
+  notesbefore = false,
+  radhyphen   = false,
+  radsuper    = true
+}
+\@ifpackageloaded{floatrow}{%
+  \floatsetup[scheme]{style=plaintop}
+}{%
+  \floatstyle{plaintype}
+  \restylefloat{scheme}
+  \floatstyle{plain}
+}
+%</ic>
+%    \end{macrocode}
+%    
+%\subsubsection{\emph{J.~Am.\ Chem.\ Soc.}\ style}
+%\changes{v2.0e}{2009/12/28}{Added missing comma after 
+%  \texttt{singlelinecheck = off}}
+%
+%    \begin{macrocode}
+%<*jacs>    
+\ProvidesFile{jacs.chemstyle.cfg}
+  [2013/07/03 v2.0m J. Am. Chem. Soc. journal style]
+\DeclareCaptionLabelSeparator{perquad}{.\quad}
+\captionsetup{
+  labelfont       = {bf,it,sf},
+  labelsep        = perquad,
+  singlelinecheck = off,
+  textfont        = sf
+}
+\captionsetup[figure]{
+  textfont = rm
+}
+\setkeys{cst}{
+  abbrcomma   = true,
+  abbremph    = false,
+  notesbefore = false,
+  radhyphen   = false,
+  radsuper    = true
+}
+\@ifpackageloaded{floatrow}{%
+  \floatsetup[scheme]{style=plaintop}
+}{%
+  \floatstyle{plaintype}
+  \restylefloat{scheme}
+  \floatstyle{plain}
+}
+%</jacs>
+%    \end{macrocode}
+%    
+%\subsubsection{\emph{J.~Organomet.\ Chem.}\ style}
+%
+%    \begin{macrocode}
+%<*jomc>    
+\ProvidesFile{jomc.chemstyle.cfg}
+  [2013/07/03 v2.0m J. Organomet. Chem. journal style]
+\setkeys{cst}{
+  abbremph  = false,
+  radhyphen = true,
+  radsuper  = true,
+}
+\captionsetup{
+  labelsep        = period,
+}
+\captionsetup[table]{
+  labelsep        = newline,
+  singlelinecheck = off
+}
+\AtBeginDocument{%
+  \def\figurename{Fig.}%
+}
+%</jomc>
+%    \end{macrocode}
+%    
+%\subsubsection{\emph{J.~Phys.\ Chem.}\ style}
+%
+%    \begin{macrocode}
+%<*jpc>    
+\ProvidesFile{jpc.chemstyle.cfg}
+  [2013/07/03 v2.0m J. Phys. Chem. journal style]
+\DeclareCaptionFormat{labelcaps}{\MakeUppercase{#1}#2#3}
+\captionsetup{
+  font            = bf,
+  format          = labelcaps,
+  labelsep        = colon,
+  singlelinecheck = off
+}
+\captionsetup[figure]{
+  format   = plain,
+  labelsep = period,
+  textfont = md
+}
+\setkeys{cst}{
+  abbrcomma   = true,
+  abbremph    = false,
+  notesbefore = false,
+  radhyphen   = false
+}
+\@ifpackageloaded{floatrow}{%
+  \floatsetup[scheme]{style=plaintop}
+}{%
+  \floatstyle{plaintype}
+  \restylefloat{scheme}
+  \floatstyle{plain}
+}
+%</jpc>
+%    \end{macrocode}
+%  
+%\subsection{\emph{Org.\ Lett.}\ style}  
+%
+%    \begin{macrocode}
+%<*orglett>    
+\ProvidesFile{orglett.chemstyle.cfg}
+  [2013/07/03 v2.0m Org. Lett. journal style]
+\DeclareCaptionLabelSeparator{perquad}{.\quad}
+\captionsetup{
+  labelfont       = bf,
+  labelsep        = perquad
+}
+\setkeys{cst}{
+  abbrcomma   = true,
+  abbremph    = false,
+  notesbefore = false,
+  radhyphen   = false,
+  radsuper    = true
+}
+%    \end{macrocode}
+% The \emph{Org.\ Lett.}\ style is a it more complicated than all of
+% the others as the float formatting is much more complicated. First,
+% colour support is needed.
+%    \begin{macrocode}
+\RequirePackage{xcolor}
+%    \end{macrocode}
+%\begin{macro}{\fs@orglett}
+%\begin{macro}{\fs@orglettfig}
+% For \pkg{float}, some new styles based on the supplied \texttt{ruled}
+% one.
+%    \begin{macrocode}
+\newcommand*\fs@orglett{%
+  \def\@fs@cfont{\bfseries}%
+  \let\@fs@capt\floatc@ruled
+  \def\@fs@pre{%
+    \begingroup
+      \color{purple}%                     
+      \hrule height 12pt depth 0pt\relax 
+      \kern 2pt\relax
+    \endgroup
+  }%
+  \def\@fs@mid{%
+    \vspace\belowcaptionskip\relax      
+  }%
+  \def\@fs@post{%
+    \begingroup
+      \color{purple}%
+      \kern 2pt\relax                     
+      \hrule height 1.5pt depth 0pt\relax 
+    \endgroup
+  }%
+  \let\@fs@iftopcapt\iftrue
+}
+\newcommand*\fs@orglettfig{%
+  \def\@fs@cfont{\bfseries}%
+  \let\@fs@capt\floatc@plain
+  \def\@fs@pre{%
+    \begingroup
+      \color{purple}%
+      \hrule height 12pt depth 0pt\relax
+      \kern 2pt\relax
+    \endgroup
+  }%
+  \def\@fs@mid{%
+    \vspace\abovecaptionskip\relax
+  }%
+  \def\@fs@post{%
+    \begingroup
+      \color{purple}%
+      \kern 2pt\relax
+      \hrule height1.5pt depth 0pt\relax
+  \endgroup
+  }%
+  \let\@fs@iftopcapt\iffalse
+}
+%    \end{macrocode}
+%\end{macro}  
+%\end{macro} 
+%
+%    \begin{macrocode}
+\DeclareFloatVCode{orglettthickrule}{%
+  \par
+  \begingroup
+    \color{purple}%
+    \hrule height 12pt depth 0pt\relax
+    \vskip 2pt\relax
+  \endgroup
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+
+%\fi
\ No newline at end of file
diff --git a/macros/latex/contrib/chemstyle/chemstyle.ins b/macros/latex/contrib/chemstyle/chemstyle.ins
new file mode 100644
index 0000000000..f238eaa708
--- /dev/null
+++ b/macros/latex/contrib/chemstyle/chemstyle.ins
@@ -0,0 +1,91 @@
+%%
+%% This is file `chemstyle.ins',
+%% generated with the docstrip utility.
+%%
+%% The original source files were:
+%%
+%% chemstyle.dtx  (with options: `install')
+%% ----------------------------------------------------------------
+%% The chemstyle bundle --- Schemes and style for chemistry
+%% E-mail: joseph.wright@morningstar2.co.uk
+%% Released under the LaTeX Project Public License v1.3c or later
+%% See http://www.latex-project.org/lppl.txt
+%% ----------------------------------------------------------------
+%% 
+\input docstrip.tex
+\keepsilent
+\askforoverwritefalse
+\preamble
+----------------------------------------------------------------
+The chemstyle bundle --- Schemes and style for chemistry
+E-mail: joseph.wright@morningstar2.co.uk
+Released under the LaTeX Project Public License v1.3c or later
+See http://www.latex-project.org/lppl.txt
+----------------------------------------------------------------
+
+\endpreamble
+\postamble
+
+Copyright (C) 2006-2011,2013 by
+  Joseph Wright <joseph.wright@morningstar2.co.uk>
+
+It may be distributed and/or modified under the conditions of
+the LaTeX Project Public License (LPPL), either version 1.3c of
+this license or (at your option) any later version.  The latest
+version of this license is in the file:
+
+   http://www.latex-project.org/lppl.txt
+
+This work is "maintained" (as per LPPL maintenance status) by
+  Joseph Wright.
+
+This work consists of the file  chemstyle.dtx and
+                                chemstyle.cdx,
+          and the derived files chemstyle.pdf,
+                                chemstyle.ins,
+                                chemstyle.sty,
+                                chemscheme.sty,
+                                and a number of .cfg files.
+
+\endpostamble
+\usedir{tex/latex/chemstyle}
+\generate{
+  \file{chemstyle.sty}{\from{chemstyle.dtx}{package}}
+  \file{chemscheme.sty}{\from{chemstyle.dtx}{chemscheme}}
+}
+\usedir{tex/latex/chemstyle/config}
+\generate{
+  \file{angew.chemstyle.cfg}{\from{chemstyle.dtx}{angew}}
+  \file{ic.chemstyle.cfg}{\from{chemstyle.dtx}{ic}}
+  \file{jacs.chemstyle.cfg}{\from{chemstyle.dtx}{jacs}}
+  \file{jomc.chemstyle.cfg}{\from{chemstyle.dtx}{jomc}}
+  \file{rsc.chemstyle.cfg}{\from{chemstyle.dtx}{rsc}}
+  \file{orglett.chemstyle.cfg}{\from{chemstyle.dtx}{orglett}}
+  \file{tetlett.chemstyle.cfg}{\from{chemstyle.dtx}{tetlett}}
+}
+\endbatchfile
+
+%% 
+%% Copyright (C) 2006-2011,2013 by
+%%   Joseph Wright <joseph.wright@morningstar2.co.uk>
+%% 
+%% It may be distributed and/or modified under the conditions of
+%% the LaTeX Project Public License (LPPL), either version 1.3c of
+%% this license or (at your option) any later version.  The latest
+%% version of this license is in the file:
+%% 
+%%    http://www.latex-project.org/lppl.txt
+%% 
+%% This work is "maintained" (as per LPPL maintenance status) by
+%%   Joseph Wright.
+%% 
+%% This work consists of the file  chemstyle.dtx and
+%%                                 chemstyle.cdx,
+%%           and the derived files chemstyle.pdf,
+%%                                 chemstyle.ins,
+%%                                 chemstyle.sty,
+%%                                 chemscheme.sty,
+%%                                 and a number of .cfg files.
+%% 
+%%
+%% End of file `chemstyle.ins'.
diff --git a/macros/latex/contrib/chemstyle/chemstyle.pdf b/macros/latex/contrib/chemstyle/chemstyle.pdf
new file mode 100644
index 0000000000..d9db202b05
--- /dev/null
+++ b/macros/latex/contrib/chemstyle/chemstyle.pdf