(3S,6S,9S,12S,15S,18S,21S)-21-((S)-2-((2S,3S)-2-((S)-2-amino-6-((2R,3R)-3-methyl-3,4-dihydro-2H-pyrrole-2-carboxamido)hexanamido)-3-methylpentanamido)-4-methylpentanamido)-6-benzyl-9,18-di-sec-butyl-15-(2,3-dichlorobenzyl)-12-(4-((2R,3R)-3-methyl-3,4-dihydro-2H-pyrrole-2-carboxamido)butyl)-5,8,11,14,17,20-hexaoxo-4,7,10,13,16,19-hexaazatricosane-1,3,23-tricarboxylic acid