Synonyms: [4,8'-Bi-2H-1-benzopyran]-3,3',5,5',7,7'-hexol,2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-, [2R-[2a,3a,4b(2'R*,3'R*)]]-;[4,8''-Biflavan]-3,3',3'',3''',4',4''',5,5'',7,7''-decol,stereoisomer (8CI);(+)-Procyanidin B2;(-)-Epicatechin-(4b,8)-(+)-epicatechin;(-)-Epicatechin-(4b-8)-(-)-epicatechin;Proanthocyanidin B2;Procyanidin B2;Procyanidol B2;