(3,8'-Bi-4H-1-benzopyran)-4,4'-dione, 2'-(3,4-dihydroxyphenyl)-2,2',3,3'-tetrahydro-3',5,5',7,7'-pentahydroxy-2-(4-hydroxyphenyl)-, (2S-(2alpha,3beta(2'S*,3'S*)))- 14736-41-5 18913-18-3 19745-26-7 GB2 Garcinia Garcinia GB2