path: root/info/maketexwork/ex-04-07

\initial
\len=4
\def\H{\hbox{\rm H}}
\def\C{\hbox{\rm C}}
\def\O{\hbox{\rm O}}

\[ \purine{$\H_3\C$}{$\O$}{$\C\H_3$}{Q}{$\O$}{Q}{Q}{D}{$\C\H_3$}  \]