CO[C@@H]1[C@@H](O)[C@@H](O)[C@H](Oc2ccc(-c3ccc(Cl)cc3)c(C(=O)NCc3ccccc3)c2)OC1(C)C
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?