O=C1NC(NS(=O)(=O)c2ccccc2)(C(F)(F)F)C(=O)N1c1ccc(F)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?