(2S)-N-{4-[(2S)-2-((2S)-2-{[(4-Nitrophenyl)sulfonyl]amino}propanoylamino)-3-methylbutanoylamino](1S,4S)-2,3-dihydroxy-5-phenyl-1-benzylpentyl}-2-((2S)-2-{[(4-nitrophenyl)sulfonyl]amino}propanoylamino)-3-methylbutanamide AIDS-107936 AIDS107936