4-amino-1-[(3R,6R,9R,12R)-1-{4-amino-1-[(2R,5R,8R,11R)-11-amino-2-(4-aminobutyl)-8-benzyl-5-(2-methylpropyl)-1,4,7,10-tetraoxo-12-phenyl-3,6,9-triazadodec-1-yl]hexahydropyridin-4-yl}-12-(4-aminobutyl)-3,6-dibenzyl-9-(2-methylpropyl)-1,4,7,10,13-pentaoxo-2,5,8,11-tetrazatridec-13-yl]hexahydropyridine-4-carboxylic acid 2,2,2-trifluoroacetic acid