CCN(CC)S(=O)(=O)c1cc(NC(=O)Cn2ncc(Cl)c(Cl)c2=O)ccc1C
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?