6,9-Methanopyrano[3',4':4,5]cyclopent[1,2-d]oxepin-3,8(1H,6H)-dione, 10-(acetyloxy)-1-(3-furanyl)-4b,5,9,9a,10,10a-hexahydro-4,4b,9-trimethyl- AIDS-142888 AIDS142888 NSC661406