(3R,7S,10S,13S,16S)-3-{[(2S)-2-[(3S)-6-carbamoyl-3-(2-methylpropyl)-1,4-dioxo-2,5-diazahex-1-yl]pyrrolidin-1-yl]carbonyl}-13-[(2S)-but-2-yl]-10-(2-carbamoylethyl)-16-[(4-methoxyphenyl)methyl]-5,9,12,15,18-pentaoxo-4,8,11,14,17-pentaza-1-thiacyclohenicosane-7-carboxylic acid