Vanillin compound obtained from vanilla beans, has total sum of...

Vanillin compound is an organic compound molecular formula $\mathrm{C}_8 \mathrm{H}_8 \mathrm{O}_3$. It is a phenolic aldehyde. Its functional compounds include aldehyde, hydroxyl and ether. It is the primary component of the extract of the vanilla beans.
Total sum of oxygen atoms and $\pi$-electrons is $3+8=11$ Total number of oxygen atoms $=3$ Total number of $\pi$-bonds $=4$ $\therefore$ Total number of $\pi$-electrons $=8$