AIDS-161087 AIDS161087 Benzyl 6-(3-((4-((benzyloxy)carbonyl)-2,2,6-trimethyl-7-oxo-1,4-diazabicyclo[3.2.0]hept-6-yl)oxy)propoxy)-2,2,6-trimethyl-7-oxo-1,4-diazabicyclo[3.2.0]heptane-4-carboxylate NSC670232 NSC670233