4-(2-{[1-({5-amino-1-[(1-{[1-({[(1-{[1-carbamoyl-3-(methylsulfanyl)propyl]carbamoyl}-3-methylbutyl)carbamoyl]methyl}carbamoyl)-2-(4-hydroxyphenyl)ethyl]carbamoyl}-2-phenylethyl)carbamoyl]pentyl}carbamoyl)-2-carbamoylethyl]carbamoyl}pyrrolidin-1-yl)-4-oxo-3-{2-[(5-oxopyrrolidin-2-yl)formamido]propanamido}butanoic acid