CN(C)C(CNC(=O)c1cc(S(=O)(=O)N(C)Cc2ccccc2)ccc1Cl)c1ccco1
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?