Cc1ccc(C(=O)C2=C(O)C(=O)N(C)C2c2ccc([N+](=O)[O-])cc2)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?