CCOC(=O)c1c(SCC(=O)Nc2cc(Cl)cc(Cl)c2)nc(=O)[nH]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?