(2S)-N-{(1S,2R)-3-[(Benzo[c]1,2,5-oxadiazol-4-ylsulfonyl)(2-methylpropyl)amino]-2-hydroxy-1-benzylpropyl}-3-methyl-2-[(3-pyridylmethoxy)carbonylamino]butanamide AIDS-072758 AIDS072758