(2S,3R)-2-((2S,4R)-2-Amino-5-benzyloxycarbonylamino-4-hydroxy-pentanoylamino)-3-[4,4'-bis-benzyloxy-3'-((S)-2-benzyloxycarbonylamino-2-pentafluorophenyloxycarbonyl-ethyl)-biphenyl-3-yl]-3-hydroxy-propionic acid methyl ester