CC1=C(C(=O)Nc2ccc([N+](=O)[O-])cc2)C(c2ccccc2O)C(C(=O)Nc2ccc([N+](=O)[O-])cc2)=C(C)N1
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?