\documentclass{ppex}
\nonstopmode
\usepackage {m-chemic}
\pagestyle{empty}
\setlength\textwidth{207.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage {m-chemic}
\setupchemical
  [axis=on,border=on,scale=small,
   size=medium]
\startchemical
  \chemical[FIVE,B,R,RZ][1,2,3,4,5]
\stopchemical
\end{document}