AHPBA deriv. AIDS-059656 AIDS059656 N-((1S,2S)-3-{(2S,4S)-2-[N-(tert-Butyl)carbamoyl]-4-chloropyrrolidinyl}-2-hydroxy-3-oxo-1-benzylpropyl)pyrrolidin-3(RS)-yloxycarboxamide [3-(R,S)-(Pyrrolidyl)oxy]carbonyl-(2S,3S)-AHPBA-4(S)-Cl-Pro-NH-t-Bu-HCl