4-Acetyl-3a,12a-dimethyl-2-oxo-1,3a,6,6a,6b,7,8,8a,9,10,11,12,12a,12b-tetradecahydro-2H-cyclopenta[b]naphtho[2,1-d]oxepin-10-yl acetate AIDS-127809 AIDS127809 NSC192737