(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-[[(2S)-2-[[(2S)-2-[[2-[[(2S)-5-(diaminomethylideneamino)-2-[[2-[[5-[(2-methyl-3-nitrosobutan-2-yl)amino]-3-[2-[(2-methyl-3-nitrosobutan-2-yl)amino]ethyl]pentyl]amino]acetyl]amino]pentanoyl]amino]-3-methylbutanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-methylpentanoyl]amino]-3-(1H-imidazol-5-yl)propanoyl]pyrrolidine-2-carbonyl]amino]-2-phenylacetyl]amino]-3-(1H-imidazol-5-yl)propanoyl]amino]-4-methylpentanoic acid