Fig. 2
From: Grape polyphenols supplementation for exercise-induced oxidative stress
Flavonoid structures. R1 = OH: Quercetin; R1 = H: Kaempferol; R2 = OH: Luteolin; R3 = OH, R4 = H: Catechin; R3 = gallate, R4 = OH: Epigallocatechin-3-gallate; R5 = OH, R6 = OH: Eriodictyol; R5 = H, R6 = OH: Naringenin; R7 = OH, R8 = H: Cyanidin, R7 = OCH3, R8 = OCH3: Malvidin