(3S)-2-[(2S)-3,3-dimethyl-2-[[(2S)-2-(methylamino)propanoyl]amino]butanoyl]-N-[[4-[[(3S,5S)-1-[(2S)-3,3-dimethyl-2-[[(2S)-2-(methylamino)propanoyl]amino]butanoyl]-5-[[(1R)-1,2,3,4-tetrahydronaphthalen-1-yl]carbamoyl]pyrrolidin-3-yl]carbamoyl]phenyl]methyl]-N-[(1R)-1-phenylethyl]-3,4-dihydro-1H-isoquinoline-3-carboxamide