C[N+](C)(C)CC(=O)N/N=C/c1oc(-c2cccc([N+](=O)[O-])c2)c(-c2cccc([N+](=O)[O-])c2)c1[N+](=O)[O-].[Cl-]
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?