CCOc1ccc(N(C(C)C(=O)Nc2ccc(OC)cc2)S(C)(=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?