C/C(CCn1[nH]c(=O)ccc1=O)=N\Nc1ccc([N+](=O)[O-])cc1[N+](=O)[O-]
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?