(3aS-cis)-2,3,3a,12a-Tetrahydro-6-hydroxy-4,8-dimethoxyanthra(2,3-b)furo(3,2-d)furan-5,10-dione 2,3,3a,12a-Tetrahydro-6-hydroxy-4,8-dimethoxyanthra(2,3-b)furo(3,2-d)furan-5,10-dione (3aS-cis)- 34080-91-6 Anthra(2,3-b)furo(3,2-d)furan-5,10-dione, 2,3,3a,12a-tetrahydro-6-hydroxy-4,8-dimethoxy-, (3aS-cis)-