AIDS-163682 AIDS163682 Fmoc-Asn-(2S, 3S)-AHPBA-Pro-NH-tBu {(S)-1-[(1S,2S)-3-((S)-2-tert-Butylcarbamoyl-pyrrolidin-1-yl)-1-cyclohexylmethyl-2-hydroxy-3-oxo-propylcarbamoyl]-2-carbamoyl-ethyl}-carbamic acid 9H-fluoren-9-ylmethyl ester