COc1ccc(-c2csc(NC(=O)COc3ccc(N(C)S(=O)(=O)c4ccc(C)cc4)cc3)n2)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 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?