(2R,5S,8S,14S,17S)-17-((S)-4-amino-2-((S)-2-decanamido-3-(1H-indol-3-yl)propanamido)-4-oxobutanamido)-8-(3-aminopropyl)-5-(carboxymethyl)-14-((R)-1-hydroxyethyl)-2-methyl-4,7,10,13,16-pentaoxo-3,6,9,12,15-pentaazanonadecane-1,19-dioic acid