AIDS-160922 AIDS160922 Acetic acid 2-acetoxy-3-(4-amino-2-methoxy-1-methyl-6-oxo-1,6-dihydro-pyrimidin-5-ylimino)-1-(1,2-diacetoxy-ethyl)-propyl ester NSC658426 NSC658427 NSC666985 NSC666986 NSC666987