17878-69-2 7H-Furo(3',2':4,5)furo(2,3-c)xanthen-7-one, 3a,12c-dihydro-6,8-dimethoxy-, (3aR,12cS)- 7H-Furo(3',2':4,5)furo(2,3-c)xanthen-7-one, 3a,12c-dihydro-6,8-dimethoxy-, (3aR-cis)- O-Methyl sterigmatocystin O-Methylsterigmatocystin Sterigmatocystin, O-methyl- (6CI)