6,7,8,9,10,11-Hexahydro-1,6-dimethyl-10,11-dioxophenanthro[1,2-b]furan-6-carboxylic acid methyl ester

(-)-6,7,8,9,10,11-Hexahydro-1,6-dimethyl-10,11-dioxophenanthro[1,2-b]furan-6-carboxylic acid methyl ester