Procyanidin B2 3,3'-di-O-gallate

Procyanidin B2, 3,3'-di-O-gallate is an active constituent. Procyanidin B2, 3,3'-di-O-gallate can be isolated from grape seed extract (GSE) procyanidin mix. Procyanidin B2, 3,3' -di-o-gallate target cancer stem cells (CSCs) in prostate cancer (PCa). Procyanidin B2, 3,3'-di-O-gallate targets both unsorted and sorted CSCs at lower doses. Procyanidin B2, 3,3'-di-O-gallate strongly suppresses the constitutive as well as Jagged1 (Notch1 ligand)-induced activated Notch1 pathway[1].

O=C(C(C=C1O)=CC(O)=C1O)O[C@@H]([C@@H](C(C=C2)=CC(O)=C2O)OC3=CC(O)=C4)[C@@H](C(C(O)=C5)=C(O[C@H](C(C=C6)=CC(O)=C6O)[C@@H]7OC(C(C=C8O)=CC(O)=C8O)=O)C(C7)=C5O)C3=C4O

[1]Tyagi A, Kumar S, Raina K, Wempe MF, Maroni PD, Agarwal R, Agarwal C. Differential effect of grape seed extract and its active constituent procyanidin B2 3,3″-di-O-gallate against prostate cancer stem cells. Mol Carcinog. 2019 Jul;58(7):1105-1117.