(1)Benzopyrano(3,4-b)furo(2,3-h)(1)benzopyran-6(6aH)-one, 12,12a-dihydro-2-isopropyl-8,9-dimethoxy- (1)Benzopyrano(3,4-b)furo(2,3-h)(1)benzopyran-6(6aH)-one, 12,12a-dihydro-8,9-dimethoxy-2-(1-methylethyl)-, (6aS-cis)- 549-22-4 Isorotenone