6,10a-Methanofuro[2',3':4,5]cyclopent[1,2-d]azonine-2,12(3H)-dione, 11-ethyldecahydro-3b-hydroxy-3-methyl-5-(tetrahydro-4-methyl-5-oxo-2-furanyl)- AIDS-148955 AIDS148955 NSC682457