C[C@H](O)[C@@H]1C(=O)N2CCc3ccc(-c4ccccc4)cc3[C@@H]2C[C@@H]1N(C)C(=O)Nc1cc(Cl)cc(Cl)c1
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?