(4,8'-Bi-2H-1-benzopyran)-3,3',5,5',7,7'-hexol, 2'-(3,5-dihydroxy-4-methoxyphenyl)-3,3',4,4'-tetrahydro-2-(4-hydroxyphenyl)-, (2R,2'R,3R,3'R,4R)- (4,8'-Bi-2H-1-benzopyran)-3,3',5,5',7,7'-hexol, 2'-(3,5-dihydroxy-4-methoxyphenyl)-3,3',4,4'-tetrahydro-2-(4-hydroxyphenyl)-, (2R-(2alpha,3alpha,4beta(2'R*,3'R*)))- 18206-61-6 Polyhydroxyflavan-3-ol Proanthocyanidin Proanthocyanidins