CCOC(=O)c1cc(C(=O)Nc2ccc(S(=O)(=O)Nc3ccc(OC)cc3)cc2)nn1C
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?