COc1cc2c(cc1NC(=O)C(C)OC(=O)c1ccc(S(=O)(=O)Nc3ccccc3Cl)cc1)oc1ccccc12
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?