%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 8-2-51 on page 546.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.83385pt}
\StartShownPreambleCommands
\usepackage[pictex]{m-ch-en}
\StopShownPreambleCommands
\begin{document}
\setupchemical[size=small,width=fit,height=5500,under=1500]
\mbox{%
   \startchemical
         \chemical[SIX,B,ER6,RZ6][0] \stopchemical
   \startchemical
         \chemical[SPACE,PLUS,SPACE] \stopchemical
 \startchemical
       \chemical[FIVE,ROT4,B125,+SB3,-SB4,Z4,SR4,RZ4][N,H]
 \stopchemical
 \startchemical \chemical[SPACE,GIVES,SPACE][?] \stopchemical
 \startchemical
       \chemical[SIX,B,EB6,R6,SUB4,FIVE,ROT4,B125,+SB3,-SB4,Z4][N]
 \stopchemical
}
\end{document}