\RequirePackage{tikz} \input chemfig.tex \ProvidesPackage\CFname[\CFdate\space v\CFver\space Draw molecule with an easy syntax (CT)] \def\printatom#1{\ensuremath{\mathrm{#1}}}% \printatom pour LaTeX. \def\CF@begin@tikzpicture{\begin{tikzpicture}}% \def\CF@end@tikzpicture{\end{tikzpicture}}% \endinput