| n<sup>2</sup>-{[(2s,5s,8s,11s,14s)-5,8-bis(4-aminobutyl)-2,11,14-tris{3-[(diaminomethylidene)amino]propyl}-3,6,9,12,15,21,26-heptaoxo-1,4,7,10,13,16,20-heptaazacyclohexacosan-16-yl]acetyl}-n<sup>5</sup>-(diaminomethylidene)-l-ornithyl-n<sup>5</sup>-(diami |
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