\documentclass{ppex}
\nonstopmode
\AtBeginDocument {\setlength \unitlength {0.09pt}}
\usepackage {hcycle}
\pagestyle{empty}
\setlength\textwidth{231.0pt}
\begin{document}
\ResetPreambleCommands
\ReadyForTheFray
\usepackage {hcycle}
\furanose[b]{1D==O;2Sa==OH;%
  3Sa==\lmoiety{HO};%
  4Sb==HOH$_2$C(HO)HC}
\qquad
\pyranose[a]{3Sb==OAc;%
  4Sa==AcO;5Sb==CH$_{2}$OTs}
\end{document}
