(3S,4S)-4-[[(2S)-2-[[(3S,4S)-4-[[(2S)-2-[[(2S)-2-benzyloxycarbonylamino-3-(4-hydroxyphenyl)propanoyl]amino]-3-methyl-butanoyl]amino]-3-hydroxy-6-methyl-heptanoyl]amino]propanoyl]amino]-3-hydroxy-6-methyl-heptanoic acid