2-Heptenoic acid, 7-amino-4-[[(2R,5S)-2-[(4-fluorophenyl)methyl]-6-methyl-5-[[(5-methyl-3-isoxazolyl)carbonyl]amino]-1,4-dioxoheptyl]amino]-7-oxo-, ethyl ester, (2E,4S)- AIDS-122298 AIDS122298