CC(C)C[C@@H](C(=O)O)n1cc(-c2cc(C(=O)N3CCNCC3)cc(-c3cn([C@@H](CCC(=O)O)C(=O)O)nn3)c2)nn1.Cl
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?