2-Heptenoic acid, 7-amino-4-[[(2R,5S)-5-[[(cyclopentylthio)carbonyl]amino]-6-methyl-1,4-dioxo-2-[[4-(trifluoromethyl)phenyl]methyl]heptyl]amino]-7-oxo-, ethyl ester, (2E,4S)- AIDS-170696 AIDS170696