CS(=O)(=O)c1ccc2nc(NC(=O)c3cccc(NS(=O)(=O)c4ccc(F)c(F)c4)c3)sc2c1
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?