CC(C)(C)n1nc2c(c1NC(=O)Cc1ccc(Cl)cc1)CS(=O)(=O)C2
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?