4331-22-0 Anthra(2,3-b)furo(3,2-d)furan-5,10-dione, 2,3,3a,12a-tetrahydro-4,6,8-trihydroxy-, (3aS,12aR)- Anthra(2,3-b)furo(3,2-d)furan-5,10-dione, 2,3,3a,12a-tetrahydro-4,6,8-trihydroxy-, (3aS-cis)- Versicolorin B