COC(=O)C1=C(C)N=C(C)/C(=C(/O)OC)C1c1cccc([N+](=O)[O-])c1
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?