\documentclass{ppex}
\nonstopmode
\AtBeginDocument {\setlength \unitlength {0.09pt}}
\usepackage {carom}
\pagestyle{empty}
\setlength\textwidth{207.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage {carom}
\cyclohexaneh
   [bdf]{1==Br;4==Br}
\cyclohexanev
   [A]{1==Br;4==Br}
\end{document}