4,8,12,16,20-Pentaazapentacosanoic acid,23-amino-2,2,6,6,7,10,10,14,14,18,18,19,22,22,24-pentadecamethyl-11-(1-methylethyl)-3,15-bis(2-methylpropyl)-5,9,13,17,21-pentaoxo-,(3S,7S,11S,15S,19S,23S)-, mono(trifluoroacetate)