(2S)-N-(4-{(2S)-3,3-Dimethyl-2-[(phenylmethoxy)carbonylamino]butanoylamino}(1S,4S,2R,3R)-3-hydroxy-2-(hydroxymethyl)-5-phenyl-1-benzylpentyl)-4,4-dimethyl-2-[(phenylmethoxy)carbonylamino]pentanamide AIDS-113258 AIDS113258