1-((2S,3S)-3-{[N2-(tert-Butoxycarbonyl)-L-asparaginyl]amino}-2-hydroxy-4-phenylbutanoyl)-L-prolyl-N1-isobutyl-L-alloisoleucinamide AIDS-163653 AIDS163653 Boc-Asn-(2S, 3S)-AHPBA-Pro-Ile-NH-iBu