C[C@H]1CN([C@@H](C)CO)C(=O)c2cccc(NS(=O)(=O)c3ccc(Cl)cc3)c2O[C@@H]1CN(C)CC1CCCCC1
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?