(2R)-2-{(2S)-2-[(2S)-2-((2S)-2-{(2S)-2-[(2S)-2-(Acetylamino)-3-carboxypropanoylamino]-4-carboxybutanoylamino}-3,3-diphenylpropanoylamino)-4-carboxybutanoylamino]-3-cyclohexylpropanoylamino}-4,4-difluorobutanoic acid AIDS-110640 AIDS110640