[(3S)-oxolan-3-yl] N-[(2S,3S)-4-[(2S)-2-benzyl-4-[(2S)-2-(2-methylprop yl)-3-oxo-4-[(1R)-2-phenyl-1-(tert-butylcarbamoyl)ethyl]-1H-pyrrol-2-y l]-3-oxo-1H-pyrrol-2-yl]-3-hydroxy-1-phenyl-butan-2-yl]carbamate