\(\begin{array}{*{20}{c}}
{C{H_3}} \\
|\,\,\,\,\, \\
{H - C - OH} \\
|\,\,\,\,\,\,\, \\
{HO - C - H\,\,\,\,\,\,\,\,\,} \\
|\,\,\,\,\,\,\, \\
{\,\,\,\,C{H_3}}
\end{array}\,\,\,\,\,\,\,\begin{array}{*{20}{c}}
\vdots \\
\vdots \\
\vdots \\
\vdots \\
\vdots \\
\vdots \\
\vdots
\end{array}\,\,\,\,\,\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,\,C{H_3}} \\
\,\,\,\,\,\,| \\
{HO - C - H} \\
\,\,\,\, \,\,|\\
{\,\,\,\,\,\,\,\,H - C - OH} \\
\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\\
{\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}}
\end{array}\)