4-[[(2S)-1-[[(5S)-6-[[(5S)-6-[[(5S)-5-[[(2S)-2,6-bis[[(2S)-2,6-bis[[(2S)-2-(3-carboxypropanoylamino)-3-(4-phenylmethoxyphenyl)propanoyl]amino]hexanoyl]amino]hexanoyl]amino]-6-[2-[(4-ethylphenyl)methylsulfanyl]ethylamino]-6-oxohexyl]amino]-5-[[(2S)-2,6-bis[[(2S)-2-(3-carboxypropanoylamino)-3-(4-phenylmethoxyphenyl)propanoyl]amino]hexanoyl]amino]-6-oxohexyl]amino]-5-[[(2S)-2-(3-carboxypropanoylamino)-3-(4-phenylmethoxyphenyl)propanoyl]amino]-6-oxohexyl]amino]-1-oxo-3-(4-phenylmethoxyphenyl)propan-2-yl]amino]-4-oxobutanoic acid