((S)-1-{(S)-1-[(1S,2S)-1-Benzyl-2-(cyclohexylmethyl-carbamoyl)-2-hydroxy-ethylcarbamoyl]-2-carbamoyl-ethylcarbamoyl}-2-phenyl-ethyl)-carbamic acid tert-butyl ester AIDS-163613 AIDS163613 Boc-Phe-Asn-(2S, 3S)-AHPBA-NH-CH2-C6H11