Cc1cc(C(=O)O)cc(S(=O)(=O)Nc2ccccc2C(=O)NC(C)c2ccccc2)c1C
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?