(4R)-4-(N-{(1S)-1-[N-((1S)-2-{(2S,4R)-2-[N-(2-Oxo-N-propylpropanoylamino)carbamoyl]-4-(phenylmethoxy)pyrrolidinyl}-1-(methylethyl)-2-oxoethyl)carbamoyl]-2-methylbutyl}-N-hydroxycarbamoyl)-4-[(2S)-2-(acetylamino)-3-carboxypropanoylamino]butanoic acid AIDS-162056 AIDS162056