3-((4R,7S,10S,13S,16S,19R)-19-amino-4-((S)-2-(((S)-6-amino-1-((2-amino-2-oxoethyl)amino)-1-oxohexan-2-yl)carbamoyl)pyrrolidine-1-carbonyl)-7-(2-amino-2-oxoethyl)-13,16-dibenzyl-6,9,12,15,18-pentaoxo-1,2-dithia-5,8,11,14,17-pentaazacycloicosan-10-yl)propanoic acid
