2-(Acetyloxy)-3-(2-(acetyloxy)-1-methylethyl)-6,10,14,16a-tetramethyl-1-oxo-1,3a,4,5,6,7,8,9,12,13,16,16a-dodecahydrocyclopenta[a]cyclopentadecen-7-yl acetate AIDS-146201 AIDS146201 NSC672223