$\mathop {{C_2}{H_5} - O - {C_2}{H_5}}\limits_{Ether} $ $\mathop {\begin{array}{*{20}{c}}
{O\,\,\,\,} \\
{||\,\,\,\,} \\
{C{H_3} - C - OC{H_3}}
\end{array}}\limits_{Methyl\,\,acetate} $
$\mathop {C{H_3} - C \equiv N}\limits_{Acetonitrile} $ $\mathop {\begin{array}{*{20}{c}}
O \\
{||} \\
{C{H_3} - C - N{H_2}}
\end{array}}\limits_{Acetamide} $



