1-(3-Furyl)-2-hydroxy-3b,6,6,9a,11a-pentamethyl-7-oxo-1,2,2a,3b,4,5,5a,6,7,9a,9b,10,11,11a-tetradecahydronaphtho[1',2':6,7]indeno[1,7a-b]oxiren-4-yl acetate 14-15 Epoxy-16.beta.-hydroxyazadirone AIDS-139228 AIDS139228 NSC647768