4H-10,4a-(Epoxymethano)cyclobuta[3,4]benz[1,2-f]azulen-4-one, 1,5,8a,9-tetrakis(acetyloxy)-3-(benzoyloxy)tetradecahydro-1,7,10-trimethyl-6-(1-oxopropoxy)- AIDS-137179 AIDS137179 NSC640929