2-[(2S,5R,8S,11S)-5-benzyl-11-(3-carbamimidamidopropyl)-8-[4-[3-[2-[2-[2-[2-[[2-[3-[3-[5-[4-(3,5-dioxohexyl)anilino]-5-oxopentyl]sulfanyl-2,5-dihydroxypyrrol-1-yl]propanoylamino]-6-[[2-[4-[[[2-[4,7,10-tris(carboxymethyl)-1,4,7,10-tetrazacyclododec-1-yl]acetyl]amino]methyl]triazol-1-yl]acetyl]amino]hexanoyl]amino]ethoxy]ethoxy]ethoxy]ethoxy]propanoylamino]butyl]-3,6,9,12,15-pentaoxo-1,4,7,10,13-pentazacyclopentadec-2-yl]acetic acid