\documentclass{ppex}
\nonstopmode
\AtBeginDocument {\setlength \unitlength {0.09pt}}
\usepackage {hetarom}
\pagestyle{empty}
\setlength\textwidth{207.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage {hetarom}
\sixunitv[b]{1==N}{1==H;2==F}{d}
\fiveunitv[b]{}{1D==O;2==Cl}{d}
\fiveunitvi[b]{}{1D==O;2==Cl}{d}
\end{document}
