(2S)-N-((1S,2R)-3-{2-[N-(tert-Butyl)carbamoyl]-4-(7-oxabicyclo[4.3.0]non-2-yl)piperazinyl}-2-hydroxy-1-benzylpropyl)-3-methyl-2-({[2-(methylethyl)(1,3-thiazol-4-yl)]methoxy}carbonylamino)butanamide AIDS-071438 AIDS071438