has role has functional parent antioxidant metabolite proanthocyanidin biflavonoid hydroxyflavan procyanidin B2 (2R,2'R,3R,3'R,4R)-2,2'-bis(3,4-dihydroxyphenyl)-3,3',4,4'-tetrahydro-2H,2'H-4,8'-bichromene-3,3',5,5',7,7'-hexol 578.52020 A proanthocyanidin consisting of two molecules of (-)-epicatechin joined by a bond between positions 4 and 8' in a beta-configuration. Procyanidin B2 can be found in Cinchona pubescens (Chinchona, in the rind, bark and cortex), in Cinnamomum verum (Ceylon cinnamon, in the rind, bark and cortex), in Crataegus monogyna (Common hawthorn, in the flower and blossom), in Uncaria guianensis (Cat's claw, in the root), in Vitis vinifera (Common grape vine, in the leaf), in Litchi chinensis (litchi, in the pericarp), in the apple, in Ecdysanthera utilis and in red wine. C30H26O12 CAS:29106-49-8 CHEBI:75632 EC-(4b,8)-EC Epicathechin-(4beta->8)-epicathechin HMDB:HMDB33973 InChI=1S/C30H26O12/c31-13-7-20(37)24-23(8-13)41-29(12-2-4-16(33)19(36)6-12)27(40)26(24)25-21(38)10-17(34)14-9-22(39)28(42-30(14)25)11-1-3-15(32)18(35)5-11/h1-8,10,22,26-29,31-40H,9H2/t22-,26-,27-,28-,29-/m1/s1 KEGG:C17639 LIPID_MAPS_instance:LMPK12030002 O[C@@H]1Cc2c(O)cc(O)c([C@@H]3[C@@H](O)[C@H](Oc4cc(O)cc(O)c34)c3ccc(O)c(O)c3)c2O[C@@H]1c1ccc(O)c(O)c1 PMID:22042007 PMID:23250807 PMID:23285083 PMID:23360097 PMID:23460126 PMID:23472464 PMID:23474305 PMID:23811048 PMID:23922881 PMID:23985492 PMID:24136906 Proanthocyanidin B2 Procyanidol B2 Reaxys:1279736 Wikipedia:Procyanidin_B2 XFZJEEAOWLFHDH-NFJBMHMQSA-N chebi_ontology (-)-epicatechin