1-((2S,3S)-4-Cyclohexyl-2-hydroxy-3-{[N-(3-phenylpropanoyl)-L-histidyl]amino}butanoyl)-L-prolyl-L-isoleucyl-L-valinamide AIDS-163657 AIDS163657 PhCH2CH2CO-His-(2S, 3S)-AHPBA-Pro-Ile-Val-NH2