(2S)-2-{(2S)-2-[(2S)-2-((2S)-2-{(2S)-2-[(2S)-2-(Acetylamino)-3-carboxypropanoylamino]-4-carboxybutanoylamino}-3,3-diphenylpropanoylamino)-4-carboxybutanoylamino]-3-cyclohexylpropanoylamino}pent-4-enoic acid AIDS-122673 AIDS122673