Synonyms: Benzoicacid, 3,4,5-trihydroxy-,(2R,2'R,3R,3'R,4S)-2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-5,5',7,7'-tetrahydroxy[4,6'-bi-2H-1-benzopyran]-3,3'-diylester (9CI); Benzoic acid, 3,4,5-trihydroxy-,2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-5,5',7,7'-tetrahydroxy[4,6'-bi-2H-1-benzopyran]-3,3'-diylester, [2R-[2a,3a,4b(2'R*,3'R*)]]-; Procyanidin B5 3,3-di-O-gallate