56617-66-4 Cyclopenta(7,8)phenanthro(10,1-bc)furan-6,9-dione, 1,2,3,7,8,11b-hexahydro-1,3-dihydroxy-11b-methyl-, (1R-(1-alpha,3-alpha,11b-alpha))- Demethoxyviridiol Desmethoxyviridiol