(2S)-N-{4-[(2S)-2-((2S)-2-{[(4-Methoxyphenyl)sulfonyl]amino}propanoylamino)-3-methylbutanoylamino](1S,4S)-2,3-dihydroxy-5-phenyl-1-benzylpentyl}-2-((2S)-2-{[(4-methoxyphenyl)sulfonyl]amino}propanoylamino)-3-methylbutanamide AIDS-107937 AIDS107937