((S)-1-{(S)-1-[(1S,2R)-1-Benzyl-2-(cyclohexylmethyl-carbamoyl)-2-hydroxy-ethylcarbamoyl]-2-carbamoyl-ethylcarbamoyl}-2-phenyl-ethyl)-carbamic acid tert-butyl ester AIDS-163611 AIDS163611 Boc-Phe-Asn-(2R, 3S)-AHPBA-NH-CH2-C6H11