AHPBA deriv. AIDS-059654 AIDS059654 N-((1S,2S)-3-{(2S,4S)-2-[N-(tert-Butyl)carbamoyl]-4-chloropyrrolidinyl}-2-hydroxy-3-oxo-1-benzylpropyl)cyclopentyloxycarboxamide [(Cyclopentyl)oxy]carbonyl-(2S,3S)-AHPBA-4(S)-Cl-Pro-NH-t-Bu