COc1ccc(Nc2nc(N/N=C/c3ccc(N(C)C)cc3)nc(C)c2[N+](=O)[O-])cc1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?