NTPA (TFA)

O=C([C@H]1N(CCC1)C(CCCCCCCCCCCCCCCCC)=O)N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N[C@H](C(N)=O)CCCNC(N)=N)=O)CCCNC(N)=N)=O)CCCNC(N)=N)=O)CCCNC(N)=N)=O)C(C)C)=O)CCCCN)=O)CCCNC(N)=N)=O)CCCCN)=O)CCCCN)=O)CCCCN.O=C(O)C(F)(F)F.[x]

[1]Govender KK, et al. Density functional theory in prediction of four stepwise protonation constants for nitrilotripropanoic acid (NTPA) . J Phys Chem A. 2009 Apr 16;113 (15) :3639-47.