31-{[8-(1H-indol-3-ylmethyl)-5-(carbamoylmethyl)-2-(carboxymethyl)-1,4,7,10-tetraoxo-3,6,9-triazanonadec-1-yl]amino}-3-[2-(2-aminophenyl)-2-oxoethyl]-25-(3-aminopropyl)-22-(carboxymethyl)-6-(1-carboxyprop-2-yl)-9-(hydroxymethyl)-19,32-dimethyl-2,5,8,11,14,18,21,24,27,30-decaoxo-4,7,10,13,17,20,23,26,29-nonaza-1-oxacyclodotriacontane-16-carboxylic acid