$C{H_3}\, - \,\,C{H_2}\, - \,\,C{H_2}\, - \,\,\mathop C\limits_{\mathop {||}\limits_{OHC\,\, - \,\,C\,\, - \,\,C{H_2}\, - \,\,C{H_3}} } \,\, - \,\,COOH$
$\begin{array}{*{20}{c}}
{C{H_2} - C = CH - C - N{H_2}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{N{H_2}\,\,\,\,\,\,\,\,\,\,OC{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$