(4R,7S,10R,13S,16R,19S,22R,25S,28R,31S)-16-((1H-indol-3-yl)methyl)-25-(2-amino-2-oxoethyl)-13,28-bis(4-aminobutyl)-31-(2-((S)-2-aminopropanamido)acetamido)-19,22-dibenzyl-10-((R)-1-hydroxyethyl)-7-(hydroxymethyl)-6,9,12,15,18,21,24,27,30-nonaoxo-1,2-dithia-5,8,11,14,17,20,23,26,29-nonaazacyclodotriacontane-4-carboxylic acid