(S)-N-((6S,9S,12R,15S,18S,21S,24S)-1-amino-12-(tert-butoxymethyl)-6-((S)-2-(2-carbamoylhydrazinecarbonyl)pyrrolidine-1-carbonyl)-15-(4-hydroxybenzyl)-18-(hydroxymethyl)-25-(1H-imidazol-4-yl)-1-imino-9-isobutyl-21-((1-nitroso-1H-indol-3-yl)methyl)-8,11,14,17,20,23-hexaoxo-2,7,10,13,16,19,22-heptaazapentacosan-24-yl)-5-oxopyrrolidine-2-carboxamide