Table 1. Proposed mechanisms for the neutralization of the DPPH radical with the antioxidant compounds of mango and papaya.

Phenolic Acid	Mechanism	Reaction with DPPH
Gallic	HAT	(+)
Protocatechuic	SET	(+)
Chlorogenic	HAT, SET	(+)
Vanillic	(-)	(-)
Caffeic	SET	(+)
p-Coumaric	HAT	(+)
Ferulic	(-)	(-)