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%%  Ein Beispiel der DANTE-Edition
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%%  2. Auflage
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%%  Beispiel 15-05-1 auf Seite 814.
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%%  Copyright (C) 2016 Herbert Voss
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%%  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.
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{349.28795pt}
\parindent=0pt
\AtBeginDocument{\leavevmode}
%StartShownPreambleCommands
\usepackage[ngerman]{babel}
\usepackage{chemmacros}\chemsetup[nomenclature]{hyphen-post-space=0pt,iupac=auto}
%StopShownPreambleCommands
\begin{document}
\makebox(0,0){\rule[-45mm]{0.4pt}{23mm}}\hfill\makebox(0,0){\rule[-45mm]{0.4pt}{23mm}}

(4-(4,4'-Bis(dimethylaminophenyl)benzhydryliden)%
  cyclohexa-2,5-dien-1-yliden)dimethylammoniumchlorid   \par
(4"=(4,4'"=Bis"-(di"-methyl"-amino"-phenyl)"-benz"-hydr"-y"-l"-iden)%
  "-cyclo"-hexa"=2,5"=dien"=1"=y"-li"-den)"-di"-methyl"-ammonium"-chlorid  \par
\iupac{(4-(4,4'-Bis|(di|me|thyl|amino|phenyl)|benz|hydr|y|li|den)%
    |cyclo|hexa-2,5-dien-1-y|li|den)|di|me|thyl|ammonium|chlorid}
\end{document}