\documentclass{ppex}
\nonstopmode
\usepackage {m-chemic}
\pagestyle{empty}
\setlength\textwidth{207.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage {m-chemic}
\startchemical[scale=small,size=medium]
 \chemical[SIX,B1,B2,B3,B4,B5,B6]
 \qquad\qquad\qquad
 \chemical[SIX,B135]
 \qquad\qquad\qquad
 \chemical[SIX,B1..5]
\stopchemical
\end{document}