(4R)-4-(N-{(1S)-1-[N-((1S)-2-{(2S,4R)-2-[N-(2-Oxo-4-phenyl-1-propylbutyl)carbamoyl]-4-(phenylmethoxy)pyrrolidinyl}-1-(methylethyl)-2-oxoethyl)carbamoyl]-2-methylbutyl}carbamoyl)-4-[(2S)-2-(acetylamino)-3-carboxypropanoylamino]butanoic acid AIDS-162023 AIDS162023