<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\input{plp}
\input{plp2}

\begin{center}
\begin{tikzpicture}%
[&gt;=stealth, help lines/.style={very thin,draw=black!25}, x=1cm, y=1cm]

% draw grid of help lines 
\draw[help lines] (0,0) grid (12,4);

% place  both structures
\node[anchor=south west, inner sep=10pt] at (0,0) (plp)  {\chemfig{!{plp}}};
\node[anchor=south west, inner sep=10pt] at (7,0) (plp2) {\chemfig{!{plp2}}};

\draw[&lt;-&gt;] (plp) -- (plp2);

\end{tikzpicture}
\end{center}</pre></body></html>