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[edit] Summary
Vitamin K1 structural diagram
Created by Maxim Iorsh en:User:Iorsh with xymtex
\documentclass{letter}
\usepackage{epic,carom,hetarom}
\pagestyle{empty}
\begin{document}
\begin{picture}(2500,1000)
\put(0,0){\naphdrv[pa]{1D==O;3==;4D==O}}
\put(680,0){\sixunitv{}{}{bcde}}
\put(1020,0){\sixunitv[f]{}{1==}{bcde}}
\put(1360,0){\sixunitv{}{}{bcde}}
\put(1700,0){\sixunitv{2==}{1==}{bcde}}
\put(1450,600){$\left[\begin{picture}(600,250)\end{picture}\right]_3$}
\end{picture}
\end{document}
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