4H-10,12a-Epoxy-7,11-methano-2H-cycloocta[3,4]benzo[1,2-c]pyran-8-acetic acid, 4-(3-furanyl)dodecahydro-12b-hydroxy-4a,7,9,9-tetramethyl-2,14-dioxo-, methyl ester AIDS-150747 AIDS150747 NSC688729