((S)-1-{(S)-1-[(1R,2S)-1-Benzyl-2-(cyclohexylmethyl-carbamoyl)-2-hydroxy-ethylcarbamoyl]-2-hydroxy-ethylcarbamoyl}-2-phenyl-ethyl)-carbamic acid tert-butyl ester AIDS-163615 AIDS163615 Boc-Phe-Ser-(2R, 3S)-AHPBA-NH-CH2-C6H11