Fig. 5
From: Spectroscopic, antioxidant and cytotoxicity studies of vanillic acids
Mechanisms of the reaction of hydroxyl radicals with vanillic acids. (A–C) attachment of the hydroxyl radical to the aromatic ring of vanillic acid, (D) hydrogen transfer (HAT mechanism) in vanillic acid, (E) hydrogen transfer (HAT mechanism) in isovanillic acid, (F) hydrogen transfer (HAT mechanism) in o-vanillic acid.
