Synonyms: [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-[2a,3a,4b(2'R*,3'R*)]]-; [4,8''-Biflavan]-3,3'',3''',4',5,5'',5''',7,7''-nonol,4'''-methoxy-, cis-2,3,cis-2'',3''-(+)- (8CI); Ouratea proanthocyanidin A;Proanthocyanidin A