(2S)-N-[3-((1S)-1-{(2S)-3,3-Dimethyl-2-[(phenylmethoxy)carbonylamino]butanoylamino}-2-phenylethyl)(1S,2S,3S)-2,4-dihydroxy-1-benzylbutyl]-3,3-dimethyl-2-[(phenylmethoxy)carbonylamino]butanamide AIDS-113259 AIDS113259