(2S)-N-((1S,2S)-3-{(2S,4S)-2-[N-(tert-butyl)carbamoyl]-4-fluoropyrrolidinyl}-2-hydroxy-3-oxo-1-benzylpropyl)-3-carbamoyl-2-[(phenylmethoxy)carbonylamino]propanamide AIDS-080387 AIDS080387 Z-Asn-(2S,3S)-AHPBA-[4(S)-fluoro]Pro t-butylamine