Procyanidin B8 is a

B type proanthocyanidin B type proanthocyanidins are a specific type of proanthocyanidin, which are a class of flavanoids. They are oligomers of flavan-3-ols. Dimeric B type proanthocyanidins These molecules have the molecular formula C30H26O12 (molar mass : 578.52 g/m ...

. Procyanidin B8 is a

catechin Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids. The name of the catechin chemical family derives from ''catechu'', which is the tannic ...

-(4α→6)-

epicatechin Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids. The name of the catechin chemical family derives from ''catechu'', which is the tannic ...

dimer. It can be found in grape seedsProcyanidin dimers and trimers from grape seeds. Jorge M. Ricardo da Silva, Jacques Rigaud, Véronique Cheynier, Annie Cheminat and Michel Moutounet,Phytochemistry, 1991, Volume 30, Issue 4, Pages 1259–1264, and in beer.Structure elucidation of proanthocyanidins: Direct synthesis and isolation from Pilsener beer. Jan Delcour, Thesis, 1985

References

Procyanidin dimers {{Aromatic-stub