4-[(2S)-2-(4-{(2S)-2-[(2S)-3-Methyl-2-(3-methylbutanoylamino)butanoylamino]-3-methylbutanoylamino}(3S,4R)-5,5,5-trifluoro-3-hydroxypentanoylamino)propanoylamino](3S,4R)-5,5,5-trifluoro-3-hydroxypentanoic acid AIDS-094301 AIDS094301 Pepstatin analog