From 59c2fb860cfc7f447fded1f644421e4ee9bff956 Mon Sep 17 00:00:00 2001
From: Karl Berry <karl@freefriends.org>
Date: Sat, 23 Apr 2011 22:39:48 +0000
Subject: mychemistry 1.5 (23apr11)

git-svn-id: svn://tug.org/texlive/trunk@22176 c570f23f-e606-0410-a88d-b1316a301751
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+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% ------------------------------------------------------------------------------------- %
+% - myChemistry - mychemistry_en.tex -------------------------------------------------- %
+% - Creating reaction schemes with LaTeX and ChemFig ---------------------------------- %
+% ------------------------------------------------------------------------------------- %
+% - Clemens Niederberger -------------------------------------------------------------- %
+% - 2011/04/23 ------------------------------------------------------------------------ %
+% ------------------------------------------------------------------------------------- %
+% - http://www.niederberger-berlin.net/2011/02/latex-mychemistry/ --------------------- %
+% - kontakt@niederberger-berlin.net --------------------------------------------------- %
+% ------------------------------------------------------------------------------------- %
+% - If you have any ideas, questions, suggestions or bugs to report, please feel free - %
+% - to contact me. -------------------------------------------------------------------- %
+% ------------------------------------------------------------------------------------- %
+% - Copyright 2011 Clemens Niederberger                                               - %
+% -                                                                                   - %
+% - This work may be distributed and/or modified under the                            - %
+% - conditions of the LaTeX Project Public License, either version 1.3                - %
+% - of this license or (at your option) any later version.                            - %
+% - The latest version of this license is in                                          - %
+% -   http://www.latex-project.org/lppl.txt                                           - %
+% - and version 1.3 or later is part of all distributions of LaTeX                    - %
+% - version 2005/12/01 or later.                                                      - %
+% -                                                                                   - %
+% - This work has the LPPL maintenance status `maintained'.                           - %
+% -                                                                                   - %
+% - The Current Maintainer of this work is Clemens Niederberger.                      - %
+% -                                                                                   - %
+% - This work consists of the files mychemistry.sty, mychemistry_de.tex,              - %
+% - mychemistry_en.tex and bondwidth.tex                                              - %
+% ------------------------------------------------------------------------------------- %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\documentclass[DIV10,titlepage,toc=index]{scrartcl}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% - Pakete ---------------------------------------------------------------------------- %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\usepackage{standalone}
+\usepackage{scrhack}                             % verbessert KOMAs Zusammenspiel mit floats
+\usepackage{emerald}                             % chemfig-Schrift
+\usepackage[utf8x]{inputenc}                     % Zeichenkodierung: Eingabe
+\usepackage[T1]{fontenc}                         % Text-Ausgabe-Codierung
+\usepackage{textcomp,mathcomp}
+\usepackage[english]{babel}                      % Sprache
+\usepackage{xspace,paralist}                     % xspace und Listen
+\usepackage{siunitx}
+  \DeclareSIUnit{\emlength}{em}
+  \DeclareSIUnit{\pt}{pt}
+  \sisetup{separate-uncertainty = true,
+           exponent-product     = \cdot,
+           per-mode             = symbol}
+\usepackage{listings,fancyvrb}                   % wortwörtliche Anzeige
+  \newcommand{\vitem}[1][]{\SaveVerb[aftersave={\item[\textnormal{\UseVerb[#1]{vsave}}]}]{vsave}}
+\usepackage[perpage,multiple]{footmisc}          % Fußnoten
+\usepackage[ngerman]{varioref}                   % flexibles Referenzieren
+  \labelformat{section}{section #1}
+  \labelformat{subsection}{section #1}
+  \labelformat{subsubsection}{section #1}
+\usepackage[dvipsnames]{xcolor}                  % Farbe
+  \colorlet{code}{RawSienna}
+  \xdefinecolor{MyDarkRed}{rgb}{0.4392,0.0627,0.0627}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% - Hyperlinks ------------------------------------------------------------------------ %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\usepackage{hyperref}
+  \hypersetup{colorlinks=true,                   % Setup der Hyperlinks und des pdf
+              linkcolor=MyDarkRed!20!red,
+              urlcolor=blue!70,
+              plainpages=false,
+              bookmarksopen=true,
+              bookmarksopenlevel=2,
+              bookmarksnumbered=true,
+              pdfstartview=FitH,
+              pdfauthor={Clemens Niederberger},
+              pdftitle={myChemistry - Examples},
+              pdfsubject={Create reaction schemes with LaTeX and ChemFig},
+              pdfkeywords={myChemistry},
+              pdfcreator={LaTeX}
+  }
+\usepackage[english,color=MyDarkRed]{mychemistry} % myChemistry
+\renewcommand\thebeispiel{\arabic{beispiel}}   % chemexec angepasst
+  \labelformat{beispiel}{example #1}
+  \labelformat{rxnfloat}{scheme #1}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% - Listings anpassen ----------------------------------------------------------------- %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\fvset{numbers=left,numbersep=3pt,xleftmargin=20pt,gobble=0,numberblanklines=true}
+\lstset{literate={ä}{{\"a}}1 {ö}{{\"o}}1 {ü}{{\"u}}1 {Ä}{{\"A}}1 {Ö}{{\"O}}1 {Ü}{{\"U}}1 {ß}{{\ss}}1}
+\lstset{
+   language=[LaTeX]TeX,
+   basicstyle={\ttfamily},                       % Grundstil
+   extendedchars=true,
+   numbers=left,                                 % Zeilennummern
+   numberstyle=\tiny,                            % Größe des Zeilennummern
+   numberblanklines=true,                        % Leerzeilen nummerieren
+   gobble=0,                                     % das erste Leerzeichen abschneiden
+   xleftmargin=20pt,                             % Einrückung links
+   breaklines=true,                              % Zeilenumbruch
+   moredelim=[is][\color{red!25!purple}]{!!}{!!},% Hervorhebung
+   commentstyle={\color[named]{Gray}},
+   emph={begin,end},                             % Umgebungen hervorheben
+   emphstyle=\color{red},
+   keywordstyle=\color{code},
+   keywordstyle=[20]\color{blue},
+   morekeywords=[20]{rxn,rxnfloat,rxnscheme,tikzpicture},
+   texcsstyle=[30]\color{code},
+   moretexcs=[30]{anywhere,arrow,branch,chemabove,chemand,chembelow,chemfig,chemmove,chemname,chemrel,chemsign,ce,color,compound,declarecompound,draw,dummy,elmove,floatplacement,floatstyle,Hpl,Hyd,lewis,listof,makeinvisible,makevisible,marrow,mCsetup,merge,mesomeric,node,nu,om,op,ox,pgfpositionnodelater,reactant,restylefloat,setarrowlength,setarrowline,setatomsep,setatomsize,setbondlength,setbondshape,setbondwidth,setcrambond,setmergelength,setrcndist,setrxnalign,setschemealign,setschemename,si,SI,textcolor,transition,vflipnext},
+   fancyvrb=true
+   }
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% - Kopf- und Fußzeile ---------------------------------------------------------------- %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\usepackage{scrpage2}
+\pagestyle{scrheadings}
+\setheadwidth{textwithmarginpar}
+\automark{section}
+\ihead{\mC v\mCversion}
+\ohead{\bfseries Examples}
+\ifoot{\small\color{gray}-~page~\thepage~-}
+\cfoot{}
+\ofoot{}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% - Komascript ------------------------------------------------------------------------ %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\setkomafont{disposition}{\rmfamily\bfseries}    % Gewicht fett und Schriftart roman
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% - neue Befehle ---------------------------------------------------------------------- %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% - weitere Makros -------------------------------------------------------------------- %
+\newcommand{\mC}{{\color{MyDarkRed}\ECFJD my\-Chemis\-try}\xspace} % Paketname
+\newcommand{\CF}{{\ECFAugie ChemFig}\xspace}     % ChemFig in der originalen Schrift
+\newcommand{\eg}{\mbox{e.\,g.}\xspace}
+\newcommand{\TikZ}{\mbox{Ti{\bfseries\itshape k}Z}\xspace}
+\newcommand*\scrom{\scriptstyle\ominus}
+\newcommand*\scrop{\scriptstyle\oplus}
+\begin{document}
+\begin{titlepage}
+  % inspired by the titlepage of chemfig's documentation
+  \begin{tikzpicture}[remember picture,overlay]
+    \shade [color=MyDarkRed,right color=white](current page.south west) rectangle ([yshift=3cm,xshift=-3cm]current page.center);
+    \shade[top color=black,bottom color=MyDarkRed]([yshift=7cm]current page.east)rectangle([yshift=2.5cm]current page.west);
+    \node[text width=\textwidth,opacity=.15,yshift=-5.3cm] at (current page.center) {%
+\begin{verbatim}
+ \begin{rxn}[,.7]
+   \setatomsep{1.5em}\footnotesize
+   \reactant[,a]{
+     \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-C(-[2]CH_3)
+       (-[6]OH)-CH_3}
+   }
+   \arrow[a.20]{}{}
+   \reactant[20]{
+     \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[@{e1}6,,,2]H_2@{e2}
+       \chembelow{O}{\oplus})-C(-[2]CH_3)(-[6]OH)-CH_3}\elmove{e1}
+       {10:4mm}{e2}{-10:4mm}
+   }
+   \arrow[,,1.42]{$-\ce{H2O}$}{}
+   \reactant{
+     \chemfig{\chembelow{C}{\oplus}(-[4]*6(=-=-=-))(-[2]
+     *6(=-=-=-))-C(-[2]CH_3)(-[6]OH)-CH_3}
+   }
+   \arrow[a.-20,-|>]{}{}
+   \reactant[-20]{
+     \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-C(-[2]CH_3)
+       (-[@{e3}6]@{e4}\chembelow{O}{\oplus}H_2)-CH_3}\elmove{e3}
+       {170:4mm}{e4}{-170:4mm}
+   }
+   \arrow[,,1.42]{$-\ce{H2O}$}{}
+   \reactant{
+     \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-
+       \chembelow{C}{\oplus}(-[2]CH_3)-CH_3}
+   }
+ \end{rxn}
+\end{verbatim}%
+};
+  \end{tikzpicture}
+  \begin{center}
+    \scalebox{4}{\mC}\par
+    \Large v\mCversion\par\bigskip
+    \footnotesize\mCdate{en}\par
+    \normalsize Clemens Niederberger\par\vskip1.5cm
+    \scalebox{3}{\color{white}Examples}%
+  \end{center}
+  \vskip3cm
+\begin{rxn}[,.7]
+  \setatomsep{1.5em}\footnotesize
+  \reactant[,a]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-C(-[2]CH_3)(-[6]OH)-CH_3} }
+    \arrow[a.20]{}{}
+    \reactant[20]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[@{e1}6,,,2]H_2@{e2}\chembelow{O}{\oplus})-C(-[2]CH_3)(-[6]OH)-CH_3}\elmove{e1}{10:4mm}{e2}{-10:4mm} }
+    \arrow[,,1.42]{$-\ce{H2O}$}{}
+    \reactant{ \chemfig{\chembelow{C}{\oplus}(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))-C(-[2]CH_3)(-[6]OH)-CH_3} }{}
+    \arrow[a.-20,-|>]{}{}
+    \reactant[-20]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-C(-[2]CH_3)(-[@{e3}6]@{e4}\chembelow{O}{\oplus}H_2)-CH_3}\elmove{e3}{170:4mm}{e4}{-170:4mm} }
+    \arrow[,,1.42]{$-\ce{H2O}$}{}
+    \reactant{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-\chembelow{C}{\oplus}(-[2]CH_3)-CH_3} }
+\end{rxn}
+\end{titlepage}
+
+\begin{abstract}
+ Since the documentation is already long enough, I decided to provide an extra file containing only examples and a few words where to find possibly interesting code.
+\end{abstract}
+
+\listof{rxnfloat}{Example Schemes}
+
+\section{Addition Reaction}\label{sec:addition}
+A simple reaction scheme with two different products.
+\begin{rxnscheme}[,H]{Addition Reaction}
+ \reactant{ \chemfig{=_[::-30]-[::60](=[::60]O)-[::-60]} }
+ \arrow{ $+ \Hpl$ }{}
+ \mesomeric[,rf]{
+   \reactant{ \chemfig{=_[:-30]-[::60](-[::60]OH)(-[::-120,.3,,,white]\oplus)-[::-60]} }
+   \marrow[below]
+   \reactant[below]{ \chemfig{\oplus-[6,.3,,,white]-[:-30]=_[::60](-[::60]OH)-[::-60]} }
+ }
+ \branch[right=of rf,,yshift=3em]{
+   \arrow{}{}
+   \reactant{ \chemname{\chemfig{=_[:-30]-[::60](-[::60]OH)(-[::-120]R)-[::-60]}}{1,2-adduct} }
+ }
+ \branch[right=of rf,,yshift=-5em]{
+   \arrow{}{}
+   \reactant{ \chemname{\chemfig{R-[6]-[:-30]=_[::60](-[::60]OH)-[::-60]}}{1,4-adduct} }
+ }
+\end{rxnscheme}
+
+\begin{lstlisting}
+ \begin{rxnscheme}[,H]{Addition Reaction}
+  \reactant{ \chemfig{=_[::-30]-[::60](=[::60]O)-[::-60]} }
+  \arrow{ $+ \Hpl$ }{}
+  \mesomeric[,rf]{
+    \reactant{ \chemfig{=_[:-30]-[::60](-[::60]OH)(-[::-120,.3,,,white]\oplus)-[::-60]} }
+    \marrow[below]
+    \reactant[below]{ \chemfig{\oplus-[6,.3,,,white]-[:-30]=_[::60](-[::60]OH)-[::-60]} }
+  }
+  \branch[right=of rf,,yshift=3em]{
+    \arrow{}{}
+    \reactant{ \chemname{\chemfig{=_[:-30]-[::60](-[::60]OH)(-[::-120]R)-[::-60]}}{1,2-adduct} }
+  }
+  \branch[right=of rf,,yshift=-5em]{
+    \arrow{}{}
+    \reactant{ \chemname{\chemfig{R-[6]-[:-30]=_[::60](-[::60]OH)-[::-60]}}{1,4-adduct} }
+  }
+ \end{rxnscheme}
+\end{lstlisting}
+
+\section{Mesomerism}
+\begin{rxnscheme}[,H,,.8]{Mesomerism}
+ \setatomsep{1.6em}
+ \reactant[,start]{ \chemname{\chemfig{*6(-=-=(-[,,,,white]\phantom{Br})-=)}}{benzene \compound{benzene}} }
+ \arrow[,,2.8]{}{}
+ \reactant{ \chemname{\chemfig{*6(-=-=(-Br)-=)}}{bromobenzene \compound{bromobenzene}} }
+ \arrow[start.below,,,pfeil_a]{\ce{Br2 / AlBr3}}{$-\ce{AlBr4\om}$}
+ \mesomeric[pfeil_a.below,mesomerism,xshift=8.5em,yshift=-2.5em]{
+   \reactant{
+     \chemfig{*6(=[@{e1}]-=-(-[:120]Br)(-[:60]H)-(-[:-30,.4,,,white]\oplus)-[@{e2}])}
+     \elmove{e1}{60:4mm}{e2}{0:4mm}
+   }
+   \marrow
+   \reactant{
+     \chemfig{*6(-(-[:90,.4,,,white]\oplus)-[@{e4}]=[@{e3}]-(-[:120]Br)(-[:60]H)-=)}
+     \elmove{e3}{180:4mm}{e4}{150:4mm}
+   }
+   \marrow
+   \reactant{
+     \chemfig{*6(-=-(-[:-150,.4,,,white]\oplus)-(-[:120]Br)(-[:60]H)-=)}
+   }
+ }
+ \branch[above=of mesomerism,,xshift=7.5em]{
+   \arrow[above]{$-\Hpl$}{}
+ }
+\end{rxnscheme}
+If you put something relative to an arrow you might have to consider, that the arrow's anchor point is in the middle of the arrow. That's why \lstinline+\mesomeric+ is shifted with \lstinline+yshift=-2.5em+ in line 9.
+\begin{lstlisting}
+ \begin{rxnscheme}[,H,,.8]{Mesomerism}
+  \setatomsep{1.6em}
+  % main reaction:
+  \reactant[,start]{ \chemname{\chemfig{*6(-=-=(-[,,,,white]\phantom{Br})-=)}}{benzene \compound{benzene}} }
+  \arrow[,,2.8]{}{}
+  \reactant{ \chemname{\chemfig{*6(-=-=(-Br)-=)}}{bromobenzene \compound{bromobenzene}} }
+  % branch:
+  \arrow[start.below,,,pfeil_a]{\ce{Br2 / AlBr3}}{$-\ce{AlBr4\om}$}
+  \mesomeric[!!pfeil_a.below!!,mesomerism,xshift=8.5em,!!yshift=-2.5em!!]{
+    \reactant{
+      \chemfig{*6(=[@{e1}]-=-(-[:120]Br)(-[:60]H)-(-[:-30,.4,,,white]\oplus)-[@{e2}])}
+      \elmove{e1}{60:4mm}{e2}{0:4mm}
+    }
+    \marrow
+    \reactant{
+      \chemfig{*6(-(-[:90,.4,,,white]\oplus)-[@{e4}]=[@{e3}]-(-[:120]Br)(-[:60]H)-=)}
+      \elmove{e3}{180:4mm}{e4}{150:4mm}
+    }
+    \marrow
+    \reactant{
+      \chemfig{*6(-=-(-[:-150,.4,,,white]\oplus)-(-[:120]Br)(-[:60]H)-=)}
+    }
+  }
+  % last arrow inside a branch, since it cannot be shifted by itself:
+  \branch[above=of mesomerism,,xshift=7.5em]{
+    \arrow[above]{$-\Hpl$}{}
+  }
+ \end{rxnscheme}
+\end{lstlisting}
+
+\section{The Titlepage}
+\begin{rxnscheme}[,,,.7]{The Titlepage}
+  \setatomsep{1.5em}\footnotesize
+  \reactant[,a]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-C(-[2]CH_3)(-[6]OH)-CH_3} }
+    \arrow[a.20]{}{}
+    \reactant[20]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[@{e1}6,,,2]H_2@{e2}\chembelow{O}{\oplus})-C(-[2]CH_3)(-[6]OH)-CH_3}\elmove{e1}{10:4mm}{e2}{-10:4mm} }
+    \arrow[,,1.42]{$-\ce{H2O}$}{}
+    \reactant{ \chemfig{\chembelow{C}{\oplus}(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))-C(-[2]CH_3)(-[6]OH)-CH_3} }{}
+    \arrow[a.-20,-|>]{}{}
+    \reactant[-20]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-C(-[2]CH_3)(-[@{e3}6]@{e4}\chembelow{O}{\oplus}H_2)-CH_3}\elmove{e3}{170:4mm}{e4}{-170:4mm} }
+    \arrow[,,1.42]{$-\ce{H2O}$}{}
+    \reactant[,end]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-\chembelow{C}{\oplus}(-[2]CH_3)-CH_3} }
+    \anywhere{below=of end}{}
+\end{rxnscheme}
+
+\begin{lstlisting}
+ \begin{rxn}[,.7]
+  \setatomsep{1.5em}\footnotesize
+  % reaction above:
+  \reactant[,a]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-C(-[2]CH_3)(-[6]OH)-CH_3} }
+  \arrow[a.45]{}{}
+  \reactant[45]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[@{e1}6,,,2]H_2@{e2}\chembelow{O}{\oplus})-C(-[2]CH_3)(-[6]OH)-CH_3}\elmove{e1}{10:4mm}{e2}{-10:4mm} }
+  \arrow[,,1.42]{$-\ce{H2O}$}{}
+  \reactant{ \chemfig{\chembelow{C}{\oplus}(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))-C(-[2]CH_3)(-[6]OH)-CH_3} }{}
+  % going down:
+  \arrow[a.-45,-|>]{}{}
+  \reactant[-45]{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-C(-[2]CH_3)(-[@{e3}6]@{e4}\chembelow{O}{\oplus}H_2)-CH_3}\elmove{e3}{170:4mm}{e4}{-170:4mm} }
+  \arrow[,,1.42]{$-\ce{H2O}$}{}
+  \reactant{ \chemfig{C(-[4]*6(=-=-=-))(-[2]*6(=-=-=-))(-[6,,,2]HO)-\chembelow{C}{\oplus}(-[2]CH_3)-CH_3} }
+ \end{rxn}
+\end{lstlisting}
+
+\section{Condensation Reaction}
+\begin{rxnscheme}[,H]{Condensation Reaction}
+ \reactant{\chemfig{**6(---(-CH_2OH)-(-OH)--)}}
+ \chemand
+ \reactant{\chemfig{**6(----(-OH)-(-HOCH_2)-)}}
+ \arrow[,-+>]{}{\ce{H2O}}
+ \reactant{\chemfig{**6(---(-CH_2-[:-30]O-[:30]CH_2-[:-30]**6(-----(-OH)-))-(-OH)--)}}
+ \arrow[-90,-+>,,dec]{}{\ce{CH2O}}
+ \anywhere{dec.180,,xshift=-.2em}{\SI{200}{\celsius}}
+ \reactant[-90,target]{\chemfig{**6(---(-CH_2-[:-30]**6(-----(-OH)-))-(-OH)--)}}
+ \branch[left=of target]{
+   \reactant{\chemfig{**6(---(-CH_2OH)-(-OH)--)}}
+   \chemand
+   \reactant{\chemfig{**6(----(-OH)-(-H)-)}}
+   \arrow[,-+>]{}{\ce{H2O}}
+ }
+\end{rxnscheme}
+\begin{lstlisting}
+ \begin{rxnscheme}[,H]{Condensation Reaction}
+  \reactant{\chemfig{**6(---(-CH_2OH)-(-OH)--)}}
+  \chemand
+  \reactant{\chemfig{**6(----(-OH)-(-HOCH_2)-)}}
+  \arrow[,-+>]{}{\ce{H2O}}
+  \reactant{\chemfig{**6(---(-CH_2-[:-30]O-[:30]CH_2-[:-30]**6(-----(-OH)-))-(-OH)--)}}
+  \arrow[-90,-+>,,dec]{}{\ce{CH2O}}
+  \anywhere{dec.180,,xshift=-.2em}{\SI{200}{\celsius}}
+  \reactant[-90,target]{\chemfig{**6(---(-CH_2-[:-30]**6(-----(-OH)-))-(-OH)--)}}
+  \branch[left=of target]{
+    \reactant{\chemfig{**6(---(-CH_2OH)-(-OH)--)}}
+    \chemand
+    \reactant{\chemfig{**6(----(-OH)-(-H)-)}}
+    \arrow[,-+>]{}{\ce{H2O}}
+  }
+ \end{rxnscheme}
+\end{lstlisting}
+
+\section{Substitution vs. Elimination}
+\begin{rxnscheme}[,H]{Substitution vs. Elimination}
+ % first reaction:
+ \reactant[,start_a]{\chemfig{@{H}H-[@{b1}:-60]\chemabove{C}{\scriptstyle\beta}(<[:-100]H)(<:[:-150]H)-[@{b2}]\chemabove{C}{\scriptstyle\alpha}(<[:20]H)(<:[:60]H)-[@{b3}:-60]@{X1}X}}
+ \arrow{E2}{}
+ \reactant{\chemfig{H-[:60]C(-[:120]H)=C(-[:60]H)-[:-60]H}}
+ \chemand
+ \reactant{\ce{X\om}}
+ \chemand
+ \reactant{\chemfig{O(-[:60]H)-[:-60]H}}
+ % second reaction:
+ \reactant[start_a.-90,start_b,yshift=-4em]{\chemfig{H-[:-60]C(<[:-100]H)(<:[:-150]H)-@{C}C(<[:20]H)(<:[:60]H)-[@{b4}:-60]@{X2}X}}
+ \arrow{S$_\text{N}$2}{}
+ \reactant{\chemfig{H-[:-60]C(<[:-100]H)(<:[:-150]H)-C(<[:-80]H)(<:[:-30]H)-[:60]OH}}
+ \chemand
+ \reactant{\ce{X\om}}
+ % nucleophile/base:
+ \anywhere{start_b.135,nuc,xshift=-3em,yshift=2em}{\chemfig{H-@{O}\chemabove{\lewis{026,O}}{\hspace{5mm}\scrom}}}
+ % electron movements:
+ \anywhere{nuc.0}{
+   \elmove{O}{90:1.5cm}{H}{180:1cm}
+   \elmove{b1}{60:1cm}{b2}{90:5mm}
+   \elmove{b3}{-170:5mm}{X1}{180:5mm}
+   \elmove{O}{-90:1cm}{C}{100:1.5cm}
+   \elmove{b4}{-170:5mm}{X2}{180:5mm}
+ }
+\end{rxnscheme}
+You may see in line 20 that the \lstinline+\elmove+ commands are put inside of \lstinline+\anywhere+. This is necessary in order to produce the right scheme. But this time you can position \lstinline+\anywhere+ literally anywhere.
+\begin{lstlisting}
+ \newcommand*\scrom{\scriptstyle\ominus}
+ \begin{rxnscheme}[,H]{Substitution vs. Elimination}
+  % first reaction:
+  \reactant[,start_a]{\chemfig{@{H}H-[@{b1}:-60]\chemabove{C}{\scriptstyle\beta}(<[:-100]H)(<:[:-150]H)-[@{b2}]\chemabove{C}{\scriptstyle\alpha}(<[:20]H)(<:[:60]H)-[@{b3}:-60]@{X1}X}}
+  \arrow{E2}{}
+  \reactant{\chemfig{H-[:60]C(-[:120]H)=C(-[:60]H)-[:-60]H}}
+  \chemand
+  \reactant{\ce{X\om}}
+  \chemand
+  \reactant{\chemfig{O(-[:60]H)-[:-60]H}}
+  % second reaction:
+  \reactant[start_a.-90,start_b,yshift=-4em]{\chemfig{H-[:-60]C(<[:-100]H)(<:[:-150]H)-@{C}C(<[:20]H)(<:[:60]H)-[@{b4}:-60]@{X2}X}}
+  \arrow{S$_\text{N}$2}{}
+  \reactant{\chemfig{H-[:-60]C(<[:-100]H)(<:[:-150]H)-C(<[:-80]H)(<:[:-30]H)-[:60]OH}}
+  \chemand
+  \reactant{\ce{X\om}}
+  % nucleophile/base:
+  \anywhere{start_b.135,nuc,xshift=-3em,yshift=2em}{\chemfig{H-@{O}\chemabove{\lewis{026,O}}{\hspace{5mm}\scrom}}}
+  % electron movements:
+  \anywhere{nuc.0}{
+    \elmove{O}{90:1.5cm}{H}{180:1cm}
+    \elmove{b1}{60:1cm}{b2}{90:5mm}
+    \elmove{b3}{-170:5mm}{X1}{180:5mm}
+    \elmove{O}{-90:1cm}{C}{100:1.5cm}
+    \elmove{b4}{-170:5mm}{X2}{180:5mm}
+  }
+ \end{rxnscheme}
+\end{lstlisting}
+
+\section{Scheme with three Lines}\label{sec:three_lines}
+\begin{rxnscheme}{Scheme with three Lines}
+ \setatomsep{1.5em}
+ \footnotesize
+ \reactant[,start]{\chemfig{EtO-(=[2]O)-[:-60](-Br)-[:-120](=[6]O)-[4]EtO}}
+ \chemand
+ \reactant{\chemfig{*6(-=-=-*5(-(=O)-\chemabove{\lewis{4:,N}}{\scrom}(-[4,.7,,,draw=none]\chemabove{K}{\scrop})-(=O)--)=)}}
+ \arrow{}{}
+ \reactant{\chemfig{*6(-=-=-*5(-(=O)-N(-(-[::-60](=[::-60]O)-[::60]EtO)-[::60](=[::60]O)-[::-60]EtO)-(=O)--)=)}}
+ % newline, started with \anywhere:
+ \anywhere{start.-90,a,xshift=-4em,yshift=-5em}{}
+ \arrow[a.0,,.6]{\chemabove{\lewis{0:,B}}{\scrom}}{}
+ \arrow{\ce{R-X}}{}
+ \reactant{\chemfig{*6(-=-=-*5(-(=O)-N(-(-[4]R)(-[::-60](=[::-60]O)-[::60]EtO)-[::60](=[::60]O)-[::-60]EtO)-(=O)--)=)}}
+ \arrow[,,1.25]{\Hpl/\ce{H2O}}{}
+ \reactant{\chemfig{*6(-=-=-*5(-(=O)-N(-(-[4]R)(-[::-60](=[::-60]O)-[::60]HO_2C)-[::60](=[::60]O)-[::-60]HO_2C)-(=O)--)=)}}
+ % newline, started with \anywhere:
+ \anywhere{a.-90,b,yshift=-7em}{}
+ \arrow[b.0]{\ce{- CO2}}{}
+ \arrow{\Hpl}{\ce{H2O}}
+ \reactant{\chemfig{R-(-[6]H)(-[2]C|O_2\om)-NH_3\op}}
+\end{rxnscheme}
+\begin{lstlisting}
+ \newcommand*\scrom{\scriptstyle\ominus}
+ \newcommand*\scrop{\scriptstyle\oplus}
+ \begin{rxnscheme}{Scheme with three Lines}
+  \setatomsep{1.5em}
+  \footnotesize
+  \reactant[,start]{\chemfig{EtO-(=[2]O)-[:-60](-Br)-[:-120](=[6]O)-[4]EtO}}
+  \chemand
+  \reactant{\chemfig{*6(-=-=-*5(-(=O)-\chemabove{\lewis{4:,N}}{\scrom}(-[4,.7,,,draw=none]\chemabove{K}{\scrop})-(=O)--)=)}}
+  \arrow{}{}
+  \reactant{\chemfig{*6(-=-=-*5(-(=O)-N(-(-[::-60](=[::-60]O)-[::60]EtO)-[::60](=[::60]O)-[::-60]EtO)-(=O)--)=)}}
+  % newline, started with \anywhere:
+  \anywhere{start.-90,a,xshift=-4em,yshift=-5em}{}
+  \arrow[a.0,,.6]{\chemabove{\lewis{0:,B}}{\scrom}}{}
+  \arrow{\ce{R-X}}{}
+  \reactant{\chemfig{*6(-=-=-*5(-(=O)-N(-(-[4]R)(-[::-60](=[::-60]O)-[::60]EtO)-[::60](=[::60]O)-[::-60]EtO)-(=O)--)=)}}
+  \arrow[,,1.25]{\Hpl/\ce{H2O}}{}
+  \reactant{\chemfig{*6(-=-=-*5(-(=O)-N(-(-[4]R)(-[::-60](=[::-60]O)-[::60]HO_2C)-[::60](=[::60]O)-[::-60]HO_2C)-(=O)--)=)}}
+  % newline, started with \anywhere:
+  \anywhere{a.-90,b,yshift=-7em}{}
+  \arrow[b.0]{\ce{- CO2}}{}
+  \arrow{\Hpl}{\ce{H2O}}
+  \reactant{\chemfig{R-(-[6]H)(-[2]C|O_2\om)-NH_3\op}}
+ \end{rxnscheme}
+\end{lstlisting}
+
+
+\section{Hydratisation}\label{sec:hydratisation}
+\pgfdeclaredecoration{ddbond}{initial}{%
+  \state{initial}[width=2pt]{%
+    \pgfpathlineto{\pgfpoint{2pt}{0pt}}%
+    \pgfpathmoveto{\pgfpoint{1.5pt}{2pt}}%
+    \pgfpathlineto{\pgfpoint{2pt}{2pt}}%
+    \pgfpathmoveto{\pgfpoint{2pt}{0pt}}%
+  }%
+  \state{final}{%
+    \pgfpathlineto{\pgfpointdecoratedpathlast}%
+  }%
+}%
+\tikzset{lddbond/.style={decorate,decoration=ddbond}}%
+\tikzset{rddbond/.style={decorate,decoration={ddbond,mirror}}}%
+\newcommand*\delm{\ensuremath{\text{\tiny$\delta\ominus$}}}%
+\newcommand*\delp{\ensuremath{\text{\tiny$\delta\oplus$}}}%
+A scheme with transition\index{transition} states.
+
+\begin{rxnscheme}{Hydratisation}
+ \reactant[,carbonyl_A]{\chemfig{R_2C=O}}
+ \anywhere{above=of carbonyl_A}{\chemfig{H-[:-30]O-[:30]H}}
+ \arrow[,<=>]{\tiny slow}{}
+ \transition[,transition_A]{\chemfig{R_2C(-[2,,2,,densely dotted]\chemabove{O}{\delp}(-[:150]H)-[:30]H)-[:-30,1.15,,,lddbond]O-[6,,,,densely dotted]H-[,,,,densely dotted]\chemabove{A}{\delm}}}
+ \anywhere{below=of transition_A,,text width=3cm}{(general transition state, acid cat.)}
+ \arrow[,<=>,.7]{}{}
+ \reactant{\chemfig{R_2C(-[:60]\chemabove{O}{\scriptstyle\oplus}H_2)-[:-60]OH}}
+ \arrow[below right,<=>,.7]{$-\Hpl$}{}
+ \reactant[below right]{\chemfig{R_2C(-[:60]OH)-[:-60]OH}}
+ \arrow[below left,<=>,.7]{}{\ce{H2O}}
+ \reactant[below left,zw]{\chemfig{R_2C(-[:60]OH)-[:-60]O|\om}}
+ \arrow[left,<=>,.7]{}{}
+ \transition[left,transition_B]{\chemfig{R_2C(-[2,,2,,densely dotted]O(-[:150]H-[4,,,,densely dotted]\chemabove{B}{\delp})-[:30]H)-[:-30,1.15,,,lddbond]\chemabove{O}{\delm}-[6,,,,draw=none]\phantom{H}}}
+ \anywhere{below=of transition_B,,text width=3cm}{(general transition state, base cat.)}
+ \arrow[left,<=>]{}{\tiny slow}
+ \reactant[left,carbonyl_B]{\chemfig{R_2C=O}}
+ \anywhere{above=of carbonyl_B}{\chemfig{H-[:-30]O-[:30]H}}
+\end{rxnscheme}
+
+For this example we first declare a style for the delocalized double bonds:
+\begin{lstlisting}
+ \pgfdeclaredecoration{ddbond}{initial}{%
+   \state{initial}[width=2pt]{%
+     \pgfpathlineto{\pgfpoint{2pt}{0pt}}%
+     \pgfpathmoveto{\pgfpoint{1.5pt}{2pt}}%
+     \pgfpathlineto{\pgfpoint{2pt}{2pt}}%
+     \pgfpathmoveto{\pgfpoint{2pt}{0pt}}%
+   }%
+   \state{final}{%
+     \pgfpathlineto{\pgfpointdecoratedpathlast}%
+   }%
+ }%
+ \tikzset{lddbond/.style={decorate,decoration=ddbond}}%
+ \tikzset{rddbond/.style={decorate,decoration={ddbond,mirror}}}%
+\end{lstlisting}
+Now the delocalized double bond can be used via \CF's fifth option (see the \CF manual):
+\begin{lstlisting}
+ \chemfig{-[,,,,lddbond]-[,,,,rddbond]}
+\end{lstlisting}
+\chemfig{-[,,,,lddbond]-[,,,,rddbond]}\par\medskip
+Further we define the two commands
+\begin{lstlisting}
+ \newcommand*\delm{\ensuremath{\text{\tiny$\delta\ominus$}}}%
+ \newcommand*\delp{\ensuremath{\text{\tiny$\delta\oplus$}}}%
+\end{lstlisting}
+to use the partial charges without effort.
+
+Then the whole code looks like follows:
+\begin{lstlisting}
+ \begin{rxnscheme}{Hydratisation}
+  \reactant[,carbonyl_A]{\chemfig{R_2C=O}}
+  \anywhere{above=of carbonyl_A}{\chemfig{H-[:-30]O-[:30]H}}
+  \arrow[,<=>]{\tiny slow}{}
+  \transition[,transition_A]{\chemfig{R_2C(-[2,,2,,densely dotted]\chemabove{O}{\delp}(-[:150]H)-[:30]H)-[:-30,1.15,,,lddbond]O-[6,,,,densely dotted]H-[,,,,densely dotted]\chemabove{A}{\delm}}}
+  \anywhere{below=of transition_A,,text width=3cm}{(general transition state, acid cat.)}
+  \arrow[,<=>,.7]{}{}
+  \reactant{\chemfig{R_2C(-[:60]\chemabove{O}{\scriptstyle\oplus}H_2)-[:-60]OH}}
+  \arrow[below right,<=>,.7]{$-\Hpl$}{}
+  \reactant[below right]{\chemfig{R_2C(-[:60]OH)-[:-60]OH}}
+  \arrow[below left,<=>,.7]{}{\ce{H2O}}
+  \reactant[below left,zw]{\chemfig{R_2C(-[:60]OH)-[:-60]O|\om}}
+  \arrow[left,<=>,.7]{}{}
+  \transition[left,transition_B]{\chemfig{R_2C(-[2,,2,,densely dotted]O(-[:150]H-[4,,,,densely dotted]\chemabove{B}{\delp})-[:30]H)-[:-30,1.15,,,lddbond]\chemabove{O}{\delm}-[6,,,,draw=none]\phantom{H}}}
+  \anywhere{below=of transition_B,,text width=3cm}{(general transition state, base cat.)}
+  \arrow[left,<=>]{\tiny langsam}{}
+  \reactant[left,carbonyl_B]{\chemfig{R_2C=O}}
+  \anywhere{above=of carbonyl_B}{\chemfig{H-[:-30]O-[:30]H}}
+ \end{rxnscheme}
+\end{lstlisting}
+You can see that \lstinline+\anywhere+ was used several times, either to place molecules or to label molecules.
+
+\section{Esterification}\label{sec:veresterung}
+\begin{rxnscheme}[,H]{Esterification}
+ \reactant{\chemfig{H-C(=[:60]O)-[:-60]O-H}}
+ \arrow[,-+>,1.5,protolysis]{\ce{H2SO4}}{\ce{HSO4\om}}
+ \anywhere{below=of protolysis,,yshift=1em}{\tiny protolysis}
+ \mesomeric{
+   \reactant{\chemfig{H-@{a2}C(-[:60]O-H)(-[:30,.5,,,draw=none]{\scriptstyle\oplus})-[:-60]O-H}}
+   \marrow
+   \reactant{\chemfig{H-C(=[:60]\chemabove{O}{\scriptstyle\oplus}-H)-[:-60]O-H}}
+ }
+ \branch[below,,xshift=-5em]{
+   \arrow[below,<=>]{\chemfig{H-[:120]@{a1}O-[:60]CH_3}}{\tiny addition}
+   \reactant[below]{\chemfig{H-C(-[2]O-[:30]H)(-\chemabove{O}{\scriptstyle\oplus}(-[:60]CH_3)-[:-60]H)-[6]O-[:-30]H}\elmove{a1}{90:1.5cm}{a2}{0:3cm}}
+ }
+ \branch[left,,yshift=-3.5em]{
+   \arrow[left,<=>]{}{\tiny protolysis}
+ }
+ \reactant[left]{\chemfig{H-C(-[2]O-[:30]H)(-O-CH_3)-[@{b1}6]@{a3}\chemabove{O}{\hspace*{-4mm}\scriptstyle\oplus}(-[:-150]H)-[:-30]H}\elmove{b1}{0:5mm}{a3}{20:5mm}}
+ \arrow[below,<=>]{\ce{- H2O}}{\tiny elimination}
+ \mesomeric[below,,xshift=6em]{
+   \reactant{\chemfig{H-C(-[:60]O-H)(-[,.5,,,draw=none]{\scriptstyle\oplus})-[:-60]O-CH_3}}
+   \marrow
+   \reactant{\chemfig{H-C(=[:60]\chemabove{O}{\scriptstyle\oplus}-H)-[:-60]O-CH_3}}
+ }
+ \arrow[,-+>,1.5]{\ce{HSO4\om}}{\ce{H2SO4}}
+ \reactant{\chemfig{H-C(=[:60]O)-[:-60]O-CH_3}}
+\end{rxnscheme}
+\begin{lstlisting}
+ \begin{rxn}{Esterification}
+  \reactant{\chemfig{H-C(=[:60]O)-[:-60]O-H}}
+  \arrow[,-+>,1.2,protolysis]{\ce{H2SO4}}{\ce{HSO4\om}}
+  \anywhere{below=of protolysis,,yshift=1em}{\tiny protolysis}
+  \mesomeric{
+    \reactant{\chemfig{H-@{a2}C(-[:60]O-H)(-[:30,.5,,,draw=none]{\scriptstyle\oplus})-[:-60]O-H}}
+    \marrow
+    \reactant{\chemfig{H-C(=[:60]\chemabove{O}{\scriptstyle\oplus}-H)-[:-60]O-H}}
+  }
+  \branch[below,,xshift=-5em]{
+    \arrow[below,<=>]{\tiny addition}{\chemfig{H-[:120]@{a1}O-[:60]CH_3}}
+    \reactant[below]{
+      \chemfig{H-C(-[2]O-[:30]H)(-\chemabove{O}{\scriptstyle\oplus}(-[:60]CH_3)-[:-60]H)-[6]O-[:-30]H}
+      \elmove{a1}{90:1.5cm}{a2}{0:3cm}
+    }
+  }
+  \branch[left,,yshift=-3.5em]{
+    \arrow[left,<=>]{}{\tiny protolysis}
+  }
+  \reactant[left]{
+    \chemfig{H-C(-[2]O-[:30]H)(-O-CH_3)-[@{b1}6]@{a3}\chemabove{O}{\hspace*{-4mm}\scriptstyle\oplus}(-[:-150]H)-[:-30]H}
+    \elmove{b1}{0:5mm}{a3}{20:5mm}
+  }
+  \arrow[below,<=>]{\ce{- H2O}}{\tiny elimination}
+  \mesomeric[below,,xshift=6em]{
+    \reactant{\chemfig{H-C(-[:60]O-H)(-[,.5,,,draw=none]{\scriptstyle\oplus})-[:-60]O-CH_3}}
+    \marrow
+    \reactant{\chemfig{H-C(=[:60]\chemabove{O}{\scriptstyle\oplus}-H)-[:-60]O-CH_3}}
+  }
+  \arrow[,-+>,1.2]{\ce{HSO4\om}}{\ce{H2SO4}}
+  \reactant{\chemfig{H-C(=[:60]O)-[:-60]O-CH_3}}
+ \end{rxnscheme}
+\end{lstlisting}
+\newpage
+
+\section{Electrophilic Addition}\label{sec:elektrophile_addition}
+This scheme forms a circle.
+\begin{rxnscheme}[,H]{Electrophilic Addition}
+ \setarrowlength{3em}
+ \reactant{\chemfig{>[:-20]C(<[:40])=[6]C(<[:-130])<[:-20]}}
+ \chemand[,plus]
+ \reactant{\chemfig{\lewis{246,Br}-\lewis{026,Br}}}
+ \arrow[plus.-90,<=>]{\footnotesize fast}{}
+ \reactant[-90,attack]{\chemfig{>[:-20]C(<[:40])=[@{db}6]C(<[:-130])<[:-20]}}
+ \anywhere{right=of attack}{
+   \chemfig{@{Br1}\lewis{246,Br}-[@{b2}]@{Br2}\lewis{026,Br}}
+   \elmove{db}{20:5mm}{Br1}{135:5mm}
+   \elmove{b2}{-120:5mm}{Br2}{-120:5mm}
+ }
+ % to the left:
+ \arrow[attack.-135,<=>,2]{\ce{- Br\om}}{\footnotesize slow}
+ \reactant[-135,carbenium_a]{\vflipnext\chemfig{-[:-30]\chembelow{C}{\scriptstyle\oplus}(-[:30])-[6]C(<[:-150])(<:[:-100])-[:-30]\lewis{137,Br}}}
+ \anywhere{below=of carbenium_a}{\footnotesize carbenium ion}
+ \arrow[,<<=>]{}{}
+ \reactant[,bromonium]{\chemfig{>:[:-60]C?(<[:160])-[6]C(<[:-110])(<:[:-150])-[:30]\lewis{17,Br}?-[4,.5,,,draw=none]{\scriptstyle\oplus}}}
+ \anywhere{below=of bromonium,,yshift=.35em}{\footnotesize bromonium ion}
+ % to the right:
+ \arrow[attack.-45,<=>,2]{\footnotesize slow}{\ce{- Br\om}}
+ \reactant[-45,carbenium_b]{\chemfig{-[:-30]\chemabove{C}{\scriptstyle\oplus}(-[:30])-[6]C(<:[:-150])(<[:-100])-[:-30]\lewis{157,Br}}}
+ \anywhere{below=of carbenium_b}{\footnotesize carbenium ion}
+ \arrow[left,<<=>]{}{}
+ \mCsetup{reset}
+\end{rxnscheme}
+
+\begin{lstlisting}
+ \begin{rxnscheme}[,H]{Electrophilic Addition}
+  \setarrowlength{3em}
+  \reactant{\chemfig{>[:-20]C(<[:40])=[6]C(<[:-130])<[:-20]}}
+  \chemand[,plus]
+  \reactant{\chemfig{\lewis{246,Br}-\lewis{026,Br}}}
+  \arrow[plus.-90,<=>]{\footnotesize fast}{}
+  \reactant[-90,attack]{\chemfig{>[:-20]C(<[:40])=[@{db}6]C(<[:-130])<[:-20]}}
+  \anywhere{right=of attack}{
+    \chemfig{@{Br1}\lewis{246,Br}-[@{b2}]@{Br2}\lewis{026,Br}}
+    \elmove{db}{20:5mm}{Br1}{135:5mm}
+    \elmove{b2}{-120:5mm}{Br2}{-120:5mm}
+  }
+  % to the left:
+  \arrow[attack.-135,<=>,2]{\ce{- Br\om}}{\footnotesize slow}
+  \reactant[-135,carbenium_a]{\vflipnext\chemfig{-[:-30]\chembelow{C}{\scriptstyle\oplus}(-[:30])-[6]C(<[:-150])(<:[:-100])-[:-30]\lewis{137,Br}}}
+  \anywhere{below=of carbenium_a}{\footnotesize carbenium ion}
+  \arrow[,<<=>]{}{}
+  \reactant[,bromonium]{\chemfig{>:[:-60]C?(<[:160])-[6]C(<[:-110])(<:[:-150])-[:30]\lewis{17,Br}?-[4,.5,,,draw=none]{\scriptstyle\oplus}}}
+  \anywhere{below=of bromonium,,yshift=.35em}{\footnotesize bromonium ion}
+  % to the right:
+  \arrow[attack.-45,<=>,2]{\footnotesize slow}{\ce{- Br\om}}
+  \reactant[-45,carbenium_b]{\chemfig{-[:-30]\chemabove{C}{\scriptstyle\oplus}(-[:30])-[6]C(<:[:-150])(<[:-100])-[:-30]\lewis{157,Br}}}
+  \anywhere{below=of carbenium_b}{\footnotesize carbenium ion}
+  \arrow[left,<<=>]{}{}
+  \mCsetup{reset}
+ \end{rxnscheme}
+\end{lstlisting}
+
+\section{Activation of Fatty Acids}\label{sec:activation_fatty_acid}
+\begin{rxnscheme}[,H]{Activation of Fatty Acids}
+ \reactant[,ATP]{\chemfig{\chemabove{O}{\hspace*{-5mm}\scrom}-P(=[2]O)(-[6]\chembelow{O}{\scrom})-O-P(=[2]O)(-[6]\chembelow{O}{\scrom})-@{O1}O-[@{b1}]@{P}P(=[2]O)(-[6]\chembelow{O}{\scrom})-O-CH_2-[6,1.5,1](-[6,.5])(-[:20,1.3]O?[a])<[7](-[2,.5])(-[6]OH)-[,,,,line width=3pt](-[2,.5])(-[6]OH)>[1]?[a](-[6,.5])-[2,1.5]N?[b]-[:18]([:30]*6(-N=-N=(-NH_2)-=))-[:90]-[:162]N=^[:-126]?[b]}}
+ \anywhere{below right=of ATP,,xshift=-4em,yshift=3em}{\bfseries ATP}
+ \arrow[below,,1.5]{}{\chemname{\chemfig{R-C(=[:-60]O)-[:60]@{O2}O-[@{b2}]H}}{fatty acid}}
+ \branch[on chain=going below]{
+   \reactant[,pyrophosphat]{
+     \chemfig{\chemabove{O}{\hspace*{-5mm}\scrom}-P(=[2]O)(-[6]\chembelow{O}{\scrom})-O-P(=[2]O)(-[6]\chembelow{O}{\scrom})-\chemabove{O}{\hspace*{5mm}\scrom}}
+     \elmove{b1}{100:1cm}{O1}{90:5mm}
+     \elmove{O2}{135:1cm}{P}{-135:1cm}
+     \elmove{b2}{-90:5mm}{O2}{-60:5mm}
+     }
+   \anywhere{below=of pyrophosphat}{pyrophosphate PP$_\text{i}$}
+   \chemand
+   \reactant[,acyl-amp]{\chemfig{R-@{C}C(=[:-60]O)-[@{b3}:60]@{O3}O-P(-[6]\chembelow{O}{\scrom})(=[2]O)-O-CH_2-[6,,1,1]r|ibos|e-[2,1.05,3,1]a|denine}}
+   \anywhere{below=of acyl-amp}{\bfseries acyl-AMP}
+ }
+ \branch[on chain=going below,,xshift=-8em]{
+   \arrow[below]{\ce{H2O}}{}
+   \reactant[below,Pi]{2~\chemfig{HO-P(=[2]O)(-[6]\chembelow{O}{\scrom})-O}}
+   \anywhere{below right=of Pi}{P$_\text{i}$}
+ }
+ \branch[,,xshift=4em]{
+   \arrow[below,-+>]{\chemfig{CoA-@{S}S-[@{b4}:-60]H}}{AMP}
+   \reactant[below,acyl-SCoA]{
+     \chemfig{R-C(=[:-60]O)-[:60]S-CoA}
+     \elmove{S}{45:3cm}{C}{-120:2cm}
+     \elmove{b3}{135:5mm}{O3}{110:7mm}
+     \elmove{b4}{-120:7mm}{S}{-100:5mm}
+   }
+   \anywhere{below=of acyl-SCoA}{acyl-SCoA}
+ }
+\end{rxnscheme}
+
+\begin{lstlisting}
+ \def\scrom{\scriptstyle\ominus}
+ \begin{rxnscheme}[,H]{Activation of Fatty Acids}
+  \reactant[,ATP]{\chemfig{\chemabove{O}{\hspace*{-5mm}\scrom}-P(=[2]O)(-[6]\chembelow{O}{\scrom})-O-P(=[2]O)(-[6]\chembelow{O}{\scrom})-@{O1}O-[@{b1}]@{P}P(=[2]O)(-[6]\chembelow{O}{\scrom})-O-CH_2-[6,1.5,1](-[6,.5])(-[:20,1.3]O?[a])<[7](-[2,.5])(-[6]OH)-[,,,,line width=3pt](-[2,.5])(-[6]OH)>[1]?[a](-[6,.5])-[2,1.5]N?[b]-[:18]([:30]*6(-N=-N=(-NH_2)-=))-[:90]-[:162]N=^[:-126]?[b]}}
+  \anywhere{below right=of ATP,,xshift=-4em,yshift=3em}{\bfseries ATP}
+  \arrow[below,,1.5]{\chemname{\chemfig{R-C(=[:-60]O)-[:60]@{O2}O-[@{b2}]H}}{fatty acid}}{}
+  \branch[on chain=going below]{
+    \reactant[,pyrophosphat]{
+      \chemfig{\chemabove{O}{\hspace*{-5mm}\scrom}-P(=[2]O)(-[6]\chembelow{O}{\scrom})-O-P(=[2]O)(-[6]\chembelow{O}{\scrom})-\chemabove{O}{\hspace*{5mm}\scrom}}
+      \elmove{b1}{100:1cm}{O1}{90:5mm}
+      \elmove{O2}{135:1cm}{P}{-135:1cm}
+      \elmove{b2}{-90:5mm}{O2}{-60:5mm}
+      }
+    \anywhere{below=of pyrophosphat}{pyrophosphate PP$_\text{i}$}
+    \chemand
+    \reactant[,acyl-amp]{\chemfig{R-@{C}C(=[:-60]O)-[@{b3}:60]@{O3}O-P(-[6]\chembelow{O}{\scrom})(=[2]O)-O-CH_2-[6,,1,1]r|ibos|e-[2,1.05,3,1]A|denine}}
+    \anywhere{below=of acyl-amp}{\bfseries acyl-AMP}
+  }
+  \branch[on chain=going below,,xshift=-8em]{
+    \arrow[below]{\ce{H2O}}{}
+    \reactant[below,Pi]{2~\chemfig{HO-P(=[2]O)(-[6]\chembelow{O}{\scrom})-O}}
+    \anywhere{below right=of Pi}{P$_\text{i}$}
+  }
+  \branch[,,xshift=4em]{
+    \arrow[below,-+>]{\chemfig{CoA-@{S}S-[@{b4}:-60]H}}{AMP}
+    \reactant[below,acyl-SCoA]{
+      \chemfig{R-C(=[:-60]O)-[:60]S-CoA}
+      \elmove{S}{135:2cm}{C}{-135:1cm}
+      \elmove{b3}{-45:5mm}{O3}{-70:7mm}
+      \elmove{b4}{-120:7mm}{S}{-100:5mm}
+    }
+    \anywhere{below=of acyl-SCoA}{acyl-SCoA}
+  }
+ \end{rxnscheme}
+\end{lstlisting}
+
+\section{Change the layout with \TikZ}\label{sec:tikz_layout}
+\begin{rxnscheme}{Change the layout with \TikZ}
+  \colorlet{mCgreen}{green!50!gray}
+  \colorlet{mCblue}{cyan!50!gray}
+  \colorlet{mCred}{magenta!50!gray}
+  \tikzset{reactant/.style={draw=#1,fill=#1!10,minimum width=.8\textwidth,inner sep=1em,rounded corners}}
+  \mCsetup{arrowlength=3em,arrowline=very thick}
+  \reactant[,,reactant=mCgreen]{
+    \chemname{\chemfig{Alky|l--[6](-[4,,,2]Acy|l)-[6]-O-P(=[2]O)(-[6]O|\om)-O-[:-30]-[:30]-[:-30]NH_2}}{\bfseries Phosphatidylethanolamine}
+  }
+  \arrow[below]{\textit{N}-acyltransferase}{}
+  \reactant[below,,reactant=mCblue]{
+    \chemname{\chemfig{Alky|l--[6](-[4,,,2]Acy|l)-[6]-O-P(=[2]O)(-[6]O|\om)-O-[:-30]-[:30]-[:-30]\chembelow{N}{H}-[:30](=[2]O)-[:-30]-[:30]-[:-30]-[:30]=_-[:-30]-[:30]=_-[:-60]-[::-60]=_[:180]-[::-30]-[::60]=_[:180]-[::-30]-[::60]-[::-60]-[::60]-[6]}}{\bfseries\textit{N}-arachidonoyl-PE}
+  }
+  \arrow[below]{Phospholipase D}{}
+  \reactant[below,,reactant=mCred]{
+    \chemname{\chemfig{HO-[:-30]-[:30]-[:-30]\chembelow{N}{H}-[:30](=[2]O)-[:-30]-[:30]-[:-30]-[:30]=_-[:-30]-[:30]=_-[:-60]-[::-60]=_[:180]-[::-30]-[::60]=_[:180]-[::-30]-[::60]-[::-60]-[::60]-[6]}}{\bfseries Anandamide}
+  }
+  \mCsetup{reset}
+\end{rxnscheme}
+This is an example for the usage of the \lstinline+<tikz>+ option. Please take a closer look at lines \numlist{5;7;11;15}.
+\begin{lstlisting}
+ \begin{rxnscheme}{Change the layout with \TikZ}
+  \colorlet{mCgreen}{green!50!gray}
+  \colorlet{mCblue}{cyan!50!gray}
+  \colorlet{mCred}{magenta!50!gray}
+  !!\tikzset{reactant/.style={draw=#1,fill=#1!10,minimum width=.8\textwidth,inner sep=1em,rounded corners}}!!
+  \mCsetup{arrowlength=3em,arrowline=very thick}
+  \reactant[,,!!reactant=mCgreen!!]{
+    \chemname{\chemfig{Alky|l--[6](-[4,,,2]Acy|l)-[6]-O-P(=[2]O)(-[6]O|\om)-O-[:-30]-[:30]-[:-30]NH_2}}{\bfseries Phosphatidylethanolamine}
+  }
+  \arrow[below]{}{\textit{N}-acyltransferase}
+  \reactant[below,,!!reactant=mCblue!!]{
+    \chemname{\chemfig{Alky|l--[6](-[4,,,2]Acy|l)-[6]-O-P(=[2]O)(-[6]O|\om)-O-[:-30]-[:30]-[:-30]\chembelow{N}{H}-[:30](=[2]O)-[:-30]-[:30]-[:-30]-[:30]=_-[:-30]-[:30]=_-[:-60] -[::-60]=_[:180]-[::-30]-[::60]=_[:180]-[::-30]- [::60]-[::-60]-[::60]-[6]}}{\bfseries\textit{N}-arachidonoyl-PE}
+  }
+  \arrow[below]{}{Phospholipase D}
+  \reactant[below,,!!reactant=mCred!!]{
+    \chemname{\chemfig{HO-[:-30]-[:30]-[:-30]\chembelow{N}{H}-[:30](=[2]O)-[:-30]-[:30]-[:-30]-[:30]=_-[:-30]-[:30]=_-[:-60] -[::-60]=_[:180]-[::-30]-[::60]=_[:180]-[::-30]- [::60]-[::-60]-[::60]-[6]}}{\bfseries Anandamide}
+  }
+  \mCsetup{reset}
+ \end{rxnscheme}
+\end{lstlisting}
+
+\section{Claisen-Kondensation}
+\begin{rxnscheme}{Claisen-Kondensation}
+ \colorlet{mCred}{red!50!gray}
+ \setatomsep{1.5em}
+ % Ergebnis:
+ \branch[,one,draw=mCred,fill=mCred!10,rounded corners,inner sep=.5em]{
+   \reactant{\chemfig{[:30]-(=[2]O)-[:-30]O--[:-30]}}
+   \chemand
+   \reactant{\chemfig{[:30]-(=[2]O)-[:-30]O--[:-30]}}
+   \arrow[,,2]{\ce{NaOEt}, \ce{EtOH}}{}
+   \reactant{\chemfig{[:30]-(=[2]O)-[:-30]-(=[2]O)-[:-30]O--[:-30]}}
+ }
+ % Mechanismus:
+ \branch[-90,,xshift=-13.5em]{
+   \arrow[-90,<<=>]{\ce{{}\om OEt}}{}
+ }
+ \mesomeric[-90,two,xshift=4.5em]{
+   \reactant{\chemfig{[:30](-[:150,.3,,,draw=none]@{C1}\scriptstyle\ominus)-(=[2]O)-[:-30]O--[:-30]}}
+   \marrow
+   \reactant{\chemfig{[:30]=(-[2]O|\om)-[:-30]O--[:-30]}}
+ }
+ \chemand
+ \reactant{\ce{EtOH}}
+ \branch[two.-90,three,xshift=-5.5em]{
+   \arrow[-90,<=>,,,both]{\chemfig[][scale=.7]{[:30]-@{C2}(=[@{b1}2]O@{O1})-[:-30]O--[:-30]}}{}
+ }
+ \reactant[three.-90]{\chemfig{-(-[@{b2}2]@{O2}O|\om)(-[6]-[:-30](=[6]O)-[:30]O-[:-30]-[:30])-[@{b3}]@{O3}O-[:30]-[:-30]}}
+ \arrow[,<=>]{}{}
+ \reactant[,four]{\chemfig{[:30]-(=[2]O)-[:-30]@{C3}(-[:-120]H)(-[@{b4}:-60]H@{H})-(=[2]O)-[:-30]O--[:-30]}}
+ \chemand
+ \reactant{\chemfig{\om @{O4}OEt}}
+ \arrow[four.-90]{}{}
+ \mesomeric[-90]{
+   \reactant{\chemfig{[:30]-(=[2]O)-[:-30]=(-[2]O|\om)-[:-30]O--[:-30]}}
+   \marrow
+   \reactant{\chemfig{[:30]-(=[2]O)-[:-30](-[6,.3,,,draw=none]\scriptstyle\ominus)-(=[2]O)-[:-30]O--[:-30]}}
+   \marrow
+   \reactant{\chemfig{[:30]-(-[2]O|\om)=[:-30]-(=[2]O)-[:-30]O--[:-30]}}
+ }
+ \arrow[-90]{\Hpl, \ce{H2O}}{}
+ \reactant[-90]{\chemfig{[:30]-(=[2]O)-[:-30]-(=[2]O)-[:-30]O--[:-30]}}
+ \anywhere{one.0}{
+   \elmove{C1}{-100:2cm}{C2}{-90:2cm}
+   \elmove{b1}{10:5mm}{O1}{0:5mm}
+   \elmove{O2}{180:5mm}{b2}{180:5mm}
+   \elmove{b3}{80:5mm}{O3}{90:5mm}
+   \elmove{b4}{0:5mm}{C3}{0:7mm}
+   \elmove{O4}{-90:1cm}{H}{-45:1cm}
+ }
+\end{rxnscheme}
+
+\begin{lstlisting}
+ \begin{rxnscheme}{Claisen-Kondensation}
+  \colorlet{mCred}{red!50!gray}
+  \setatomsep{1.5em}
+  % Ergebnis:
+  \branch[,one,draw=mCred,fill=mCred!10,rounded corners,inner sep=.5em]{
+    \reactant{\chemfig{[:30]-(=[2]O)-[:-30]O--[:-30]}}
+    \chemand
+    \reactant{\chemfig{[:30]-(=[2]O)-[:-30]O--[:-30]}}
+    \arrow[,,2]{\ce{NaOEt}, \ce{EtOH}}{}
+    \reactant{\chemfig{[:30]-(=[2]O)-[:-30]-(=[2]O)-[:-30]O--[:-30]}}
+  }
+  % Mechanismus:
+  \branch[-90,,xshift=-13.5em]{
+    \arrow[-90,<=>]{\ce{{}\om OEt}}{}
+  }
+  \mesomeric[-90,two,xshift=4.5em]{
+    \reactant{\chemfig{[:30](-[:150,.3,,,draw=none]@{C1}\scriptstyle\ominus)-(=[2]O)-[:-30]O--[:-30]}}
+    \marrow
+    \reactant{\chemfig{[:30]=(-[2]O|\om)-[:-30]O--[:-30]}}
+  }
+  \chemand
+  \reactant{\ce{EtOH}}
+  \branch[two.-90,three,xshift=-5.5em]{
+    \arrow[-90,<=>,,,both]{\chemfig[][scale=.7]{[:30]-@{C2}(=[@{b1}2]O@{O1})-[:-30]O--[:-30]}}{}
+  }
+  \reactant[three.-90]{\chemfig{-(-[@{b2}2]@{O2}O|\om)(-[6]-[:-30](=[6]O)-[:30]O-[:-30]-[:30])-[@{b3}]@{O3}O-[:30]-[:-30]}}
+  \arrow[,<=>]{}{}
+  \reactant[,four]{\chemfig{[:30]-(=[2]O)-[:-30]@{C3}(-[:-120]H)(-[@{b4}:-60]H@{H})-(=[2]O)-[:-30]O--[:-30]}}
+  \chemand
+  \reactant{\chemfig{\om @{O4}OEt}}
+  \arrow[four.-90]{}{}
+  \mesomeric[-90]{
+    \reactant{\chemfig{[:30]-(=[2]O)-[:-30]=(-[2]O|\om)-[:-30]O--[:-30]}}
+    \marrow
+    \reactant{\chemfig{[:30]-(=[2]O)-[:-30](-[6,.3,,,draw=none]\scriptstyle\ominus)-(=[2]O)-[:-30]O--[:-30]}}
+    \marrow
+    \reactant{\chemfig{[:30]-(-[2]O|\om)=[:-30]-(=[2]O)-[:-30]O--[:-30]}}
+  }
+  \arrow[-90]{\Hpl, \ce{H2O}}{}
+  \reactant[-90]{\chemfig{[:30]-(=[2]O)-[:-30]-(=[2]O)-[:-30]O--[:-30]}}
+  \anywhere{one.0}{
+    \elmove{C1}{-100:2cm}{C2}{-90:2cm}
+    \elmove{b1}{10:5mm}{O1}{0:5mm}
+    \elmove{O2}{180:5mm}{b2}{180:5mm}
+    \elmove{b3}{80:5mm}{O3}{90:5mm}
+    \elmove{b4}{0:5mm}{C3}{0:7mm}
+    \elmove{O4}{-90:1cm}{H}{-45:1cm}
+  }
+ \end{rxnscheme}
+\end{lstlisting}
+
+
+\section{Extensive Synthesis}\label{sec:tikzsynthese}
+As last example we can create extensive syntheses, using the \lstinline=\merge= command.
+\begin{rxnscheme}[,,,.8]{Extensive Synthesis}
+ \setatomsep{1.5em}
+ \branch[,start_left]{
+   \reactant{\chemfig{=_[::30]-[::-60]-[::60](-[::-60])(-[::120])-[::0]OH}}
+   \arrow[below]{\ce{HBr}}{}
+   \reactant[below]{\chemfig{Br-[::30]-[::-60]=_[::60](-[::-60])-[::60]}}
+ }
+ \branch[right=of start_left,start_center,yshift=1em]{
+   \reactant{\chemname{\chemfig[][scale=.8]{**6(--(-SO_2Cl)---(-)-)}}{tosyle chloride}}
+   \arrow[below]{\ce{NaOH}}{\ce{Zn}}
+   \reactant[below]{\chemfig[][scale=.8]{**6(--(-SO_2Na)---(-)-)}}
+ }
+ \branch[right=of start_center,start_right,xshift=3em,yshift=-10em]{
+   \reactant{\chemname{\chemfig{-[::30](-[::60])=_[::-60]-[::60]COOH}}{3-methyl-2-butenoic acid}}
+   \arrow[below]{\ce{CH3OH}}{}
+   \reactant[below]{\chemfig{-[::30](-[::60])=_[::-60]-[::60]CO_2CH_3}}
+ }
+ \branch[below=of start_left,target_one,xshift=5em,yshift=-5em]{
+   \reactant{\chemfig[][scale=.8]{**6(--(-SO_2-[:30]-[::-60]=_[::60](-[::60])-[::-60])---(-)-)}}
+ }
+ \branch[below=of target_one,target_two,xshift=6em,yshift=-6em]{
+   \mesomeric{\chemfig[][scale=.8]{-[::30](-[::60])=^[::-60]-[::60](-[::60]S(=[::90]O)(=[::-90]O)-[::0]**6(---(-)---))-[::-60](-[::0])(-[::-120])-[::60](-[::60,.5,,,white]\ominus)-[::-60]CO_2CH_3}}
+   \arrow[below,,.5]{}{}
+   \arrow[below,,.5]{\ce{KOH}}{}
+   \reactant[below]{\chemname{\chemfig{-[::-30](-[::-60])=^[::60]>[::-60](-[::90,1.2])-[::30,1.2](-[::120,1.2](-[::-60])-[::0])<:[::-30]COOH}}{\emph{trans}-chrysanthemum acid}}
+ }
+ \merge{target_one}{start_left}{start_center}
+ \merge[\ce{NaOCH3}]{target_two}{target_one}{start_right}
+\end{rxnscheme}
+\begin{lstlisting}
+ \begin{rxnscheme}[,,,.8]{Extensive Synthesis}
+  \setatomsep{1.5em}
+  \branch[,start_left]{
+    \reactant{\chemfig{=_[::30]-[::-60]-[::60](-[::-60])(-[::120])-[::0]OH}}
+    \arrow[below]{\ce{HBr}}{}
+    \reactant[below]{\chemfig{Br-[::30]-[::-60]=_[::60](-[::-60])-[::60]}}
+  }
+  \branch[right=of start_left,start_center,yshift=1em]{
+    \reactant{\chemname{\chemfig[][scale=.8]{**6(--(-SO_2Cl)---(-)-)}}{tosyle chloride}}
+    \arrow[below]{\ce{NaOH}}{\ce{Zn}}
+    \reactant[below]{\chemfig[][scale=.8]{**6(--(-SO_2Na)---(-)-)}}
+  }
+  \branch[right=of start_center,start_right,xshift=3em,yshift=-10em]{
+    \reactant{\chemname{\chemfig{-[::30](-[::60])=_[::-60]-[::60]COOH}}{3-methyl-2-butenoic acid}}
+    \arrow[below]{\ce{CH3OH}}{}
+    \reactant[below]{\chemfig{-[::30](-[::60])=_[::-60]-[::60]CO_2CH_3}}
+  }
+  \branch[below=of start_left,target_one,xshift=5em,yshift=-5em]{
+    \reactant{\chemfig[][scale=.8]{**6(--(-SO_2-[:30]-[::-60]=_[::60](-[::60])-[::-60])---(-)-)}}
+  }
+  \branch[below=of target_one,target_two,xshift=6em,yshift=-6em]{
+    \mesomeric{\chemfig[][scale=.8]{-[::30](-[::60])=^[::-60]-[::60](-[::60]S(=[::90]O)(=[::-90]O)-[::0]**6(---(-)---))-[::-60](-[::0])(-[::-120])-[::60](-[::60,.5,,,white]\ominus)-[::-60]CO_2CH_3}}
+    \arrow[below,,.5]{}{}
+    \arrow[below,,.5]{\ce{KOH}}{}
+    \reactant[below]{\chemname{\chemfig{-[::-30](-[::-60])=^[::60]>[::-60](-[::90,1.2])-[::30,1.2](-[::120,1.2](-[::-60])-[::0])<:[::-30]COOH}}{\emph{trans}-chrysanthemum acid}}
+  }
+  \merge{target_one}{start_left}{start_center}
+  \merge[\ce{NaOCH3}]{target_two}{target_one}{start_right}
+ \end{rxnscheme}
+\end{lstlisting}
+Let's go through the code, piece by piece.
+\begin{lstlisting}
+ \begin{rxnscheme}[,,,.8]{Extensive Synthesis}
+  \setatomsep{1.5em}
+  \branch[,start_left]{
+    \reactant{\chemfig{=_[::30]-[::-60]-[::60](-[::-60])(-[::120])-[::0]OH}}
+    \arrow[below]{\ce{HBr}}{}
+    \reactant[below]{\chemfig{Br-[::30]-[::-60]=_[::60](-[::-60])-[::60]}}
+  }
+\end{lstlisting}
+In lines \numlist{1;2} we begin the environment and make sure, that the formul\ae\ don't become to big. In lines \numrange{3}{7} the first two reactants are written (lines \numlist{4;6}) and connected with an arrow (line \num{5}).
+\begin{rxn}[,.8]
+  \setatomsep{1.5em}
+  \branch[,start_left]{
+    \reactant{\chemfig{=_[::30]-[::-60]-[::60](-[::-60])(-[::120])-[::0]OH}}
+    \arrow[below]{\ce{HBr}}{}
+    \reactant[below]{\chemfig{Br-[::30]-[::-60]=_[::60](-[::-60])-[::60]}}
+  }
+\end{rxn}
+\begin{lstlisting}[firstnumber=8]
+  \branch[right=of start_left,start_center,yshift=1em]{
+    \reactant{\chemname{\chemfig[][scale=.8]{**6(--(-SO_2Cl)---(-)-)}}{tosyle chloride}}
+    \arrow[below]{\ce{NaOH}}{\ce{Zn}}
+    \reactant[below]{\chemfig[][scale=.8]{**6(--(-SO_2Na)---(-)-)}}
+  }
+\end{lstlisting}
+In the following lines \numrange{8}{12}, we create the second branch of the synthesis.
+\begin{rxn}[,.8]
+ \setatomsep{1.5em}
+ \branch[,start_left]{
+   \reactant{\chemfig{=_[::30]-[::-60]-[::60](-[::-60])(-[::120])-[::0]OH}}
+   \arrow[below]{\ce{HBr}}{}
+   \reactant[below]{\chemfig{Br-[::30]-[::-60]=_[::60](-[::-60])-[::60]}}
+ }
+ \branch[right=of start_left,start_center,yshift=1em]{
+   \reactant{\chemname{\chemfig[][scale=.8]{**6(--(-SO_2Cl)---(-)-)}}{tosyle chloride}}
+   \arrow[below]{\ce{NaOH}}{\ce{Zn}}
+   \reactant[below]{\chemfig[][scale=.8]{**6(--(-SO_2Na)---(-)-)}}
+ }
+\end{rxn}
+\begin{lstlisting}[firstnumber=13]
+  \branch[right=of start_center,start_right,xshift=3em,yshift=-10em]{
+    \reactant{\chemname{\chemfig{-[::30](-[::60])=_[::-60]-[::60]COOH}}{3-methyl-2-butenoic acid}}
+    \arrow[below]{\ce{CH3OH}}{}
+    \reactant[below]{\chemfig{-[::30](-[::60])=_[::-60]-[::60]CO_2CH_3}}
+  }
+  \branch[below=of start_left,target_one,xshift=5em,yshift=-5em]{
+    \reactant{\chemfig[][scale=.8]{**6(--(-SO_2-[:30]-[::-60]=_[::60](-[::60])-[::-60])---(-)-)}}
+  }
+\end{lstlisting}
+In lines \numrange{13}{20} we create the third branch and the product of the first two branches.
+\begin{rxn}[,.8]
+ \setatomsep{1.5em}
+ \branch[,start_left]{
+   \reactant{\chemfig{=_[::30]-[::-60]-[::60](-[::-60])(-[::120])-[::0]OH}}
+   \arrow[below]{\ce{HBr}}{}
+   \reactant[below]{\chemfig{Br-[::30]-[::-60]=_[::60](-[::-60])-[::60]}}
+ }
+ \branch[right=of start_left,start_center,yshift=1em]{
+   \reactant{\chemname{\chemfig[][scale=.8]{**6(--(-SO_2Cl)---(-)-)}}{tosyle chloride}}
+   \arrow[below]{\ce{NaOH}}{\ce{Zn}}
+   \reactant[below]{\chemfig[][scale=.8]{**6(--(-SO_2Na)---(-)-)}}
+ }
+ \branch[right=of start_center,start_right,xshift=3em,yshift=-10em]{
+   \reactant{\chemname{\chemfig{-[::30](-[::60])=_[::-60]-[::60]COOH}}{3-methyl-2-butenoic acid}}
+   \arrow[below]{\ce{CH3OH}}{}
+   \reactant[below]{\chemfig{-[::30](-[::60])=_[::-60]-[::60]CO_2CH_3}}
+ }
+ \branch[below=of start_left,target_one,xshift=5em,yshift=-5em]{
+   \reactant{\chemfig[][scale=.8]{**6(--(-SO_2-[:30]-[::-60]=_[::60](-[::60])-[::-60])---(-)-)}}
+ }
+\end{rxn}
+\begin{lstlisting}[firstnumber=21]
+ \branch[below=of target_one,target_two,xshift=6em,yshift=-6em]{
+   \mesomeric{\chemfig[][scale=.8]{-[::30](-[::60])=^[::-60]-[::60](-[::60]S(=[::90]O)(=[::-90]O)-[::0]**6(---(-)---))-[::-60](-[::0])(-[::-120])-[::60](-[::60,.5,,,white]\ominus)-[::-60]CO_2CH_3}}
+   \arrow[below,,.5]{}{}
+   \arrow[below,,.5]{\ce{KOH}}{}
+   \reactant[below]{\chemname{\chemfig{-[::-30](-[::-60])=^[::60]>[::-60](-[::90,1.2])-[::30,1.2](-[::120,1.2](-[::-60])-[::0])<:[::-30]COOH}}{\emph{trans}-chrysanthemum acid}}
+ }
+\end{lstlisting}
+In lines \numrange{21}{26} we create the last branch.
+\begin{rxn}[,.8]
+ \dummy[start_left]
+ \branch[right=of start_left,start_right,xshift=13em,yshift=-4em]{
+   \reactant[below]{\chemfig{-[::30](-[::60])=_[::-60]-[::60]CO_2CH_3}}
+ }
+ \branch[below=of start_left,target_one,xshift=5em]{
+   \reactant{\chemfig[][scale=.8]{**6(--(-SO_2-[:30]-[::-60]=_[::60](-[::60])-[::-60])---(-)-)}}
+ }
+ \branch[below=of target_one,target_two,xshift=6em,yshift=-6em]{
+   \mesomeric{\chemfig[][scale=.8]{-[::30](-[::60])=^[::-60]-[::60](-[::60]S(=[::90]O)(=[::-90]O)-[::0]**6(---(-)---))-[::-60](-[::0])(-[::-120])-[::60](-[::60,.5,,,white]\ominus)-[::-60]CO_2CH_3}}
+   \arrow[below,,.5]{}{}
+   \arrow[below,,.5]{\ce{KOH}}{}
+   \reactant[below]{\chemname{\chemfig{-[::-30](-[::-60])=^[::60]>[::-60](-[::90,1.2])-[::30,1.2](-[::120,1.2](-[::-60])-[::0])<:[::-30]COOH}}{\emph{trans}-chrysanthemum acid}}
+ }
+\end{rxn}
+Finally, the different branches are merged, the second merging arrow gets a label and the environment is ended.
+\begin{lstlisting}[firstnumber=27]
+  \merge{target_one}{start_left}{start_center}
+  \merge[\ce{NaOCH3}]{target_two}{target_one}{start_right}
+ \end{rxnscheme}
+\end{lstlisting}
+\end{document}
\ No newline at end of file
-- 
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