IUPAC: (4S)-4-{[(1S)-1-[({[(1S)-1-{[(1S)-1-{[(1S)-1-{[(1S)-1-{[(1S)-4-carbamimidamido-1-carboxybutyl]carbamoyl}ethyl]carbamoyl}-2-hydroxyethyl]carbamoyl}-2-phenylethyl]carbamoyl}-2-phenylethyl]carbamoyl}methyl)carbamoyl]-3-carboxypropyl]carbamoyl}-4-[(2S)-3-carbamoyl-2-[(2S)-2-[(2S)-3-carbamoyl-2-[(2S)-3-methyl-2-(2-{[(2S)-5-oxopyrrolidin-2-yl]formamido}acetamido)butanamido]propanamido]-3-carboxypropanamido]propanamido]butanoic acid

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