(2S)-6-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-5-amino-2-[[(2S)-2-[[(2S)-2-[[(2S,5S,8S,11S,15Z,20S)-20-[[(2S)-2-[[(2S)-1-[(2S)-4-amino-2-[[(2S)-2-[[(2S)-2-amino-4-carboxybutanoyl]amino]-4-carboxybutanoyl]amino]-4-oxobutanoyl]pyrrolidine-2-carbonyl]amino]-4-carboxybutanoyl]amino]-2-[(2S)-butan-2-yl]-8-(carboxymethyl)-11,20-dimethyl-5-(2-methylpropyl)-3,6,9,21-tetraoxo-1,4,7,10-tetrazacyclohenicos-15-ene-11-carbonyl]amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-3-methylbutanoyl]amino]-5-oxopentanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-3-methylbutanoyl]amino]-4-methylsulfanylbutanoyl]amino]hexanoic acid