(2S,2'R,3R,3'R)-3',5,5',7,7'-Pentahydroxy-2'-(3-hydroxy-4-methoxyphenyl)-2-(4-hydroxyphenyl)-2,2',3,3'-tetrahydro-4H,4'H-3,8'-bichromene-4,4'-dione
(2s,2'r,3r,3'r)-3',5,5',7,7'-pentahydroxy-2'-(3-hydroxy-4-methoxyphenyl)-2-(4-hydroxyphenyl)-2,2',3,3'-tetrahydro-4h,4'h-3,8'-bichromene-4,4'-dione