CCOC(=O)c1ccc(NC(=O)CSc2ncc(S(=O)(=O)c3ccc(C)c(Cl)c3)c(=O)[nH]2)cc1
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?