(2S)-2-[(2R)-2-[(2S)-2-{[(2S)-1-[(2S)-2-[(2S,3S)-2-[(2S)-2-[(2S)-2-[(2S)-2-[(2S)-2-amino-3-carboxypropanamido]-5-carbamimidamidopentanamido]-3-methylbutanamido]-3-(4-hydroxyphenyl)propanamido]-3-methylpentanamido]-3-(1H-imidazol-4-yl)propanoyl]pyrrolidin-2-yl]formamido}-3-phenylpropanamido]-3-(1H-imidazol-4-yl)propanamido]-4-methylpentanoic acid; bis(acetic acid)