1H-Phenanthro[3,2-b]pyran-7,12(2H,8H)-dione,4a,5,6,9,10,12b-hexahydro-5,9-dihydroxy-6,10-dimethoxy-3,4,12b-trimethyl-,[4aS-(4aa,5b,6a,9a,10b,12bb)]-