CC(=O)N1c2ccc(S(=O)(=O)N3CCC(C(=O)Nc4cccc(Cl)c4C)CC3)cc2CC1C
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?