Vanillin compound obtained from vanilla beans, has total sum of oxygen atoms and $$\pi$$ electrons is ______

Vanillin: 4-hydroxy-3-methoxybenzaldehyde. C₈H₈O₃. O atoms: 3 (OH, OCH₃, CHO). π electrons: benzene ring (3 C=C→6π) + C=O (2π) = 8π... Wait: benzene has 6π electrons (3 double bonds), aldehyde C=O has 2π electrons. Total π electrons = 6+2=8.

Sum of O atoms + π electrons = 3+8=11.

The answer is $$\boxed{11}$$.