C/C(=N/Nc1ccc([N+](=O)[O-])cc1[N+](=O)[O-])C(CC(C(=O)NCc1ccccc1)/C(C)=N\Nc1ccc([N+](=O)[O-])cc1[N+](=O)[O-])C(=O)NCc1ccccc1
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?