Cc1onc(-c2c(F)cccc2Cl)c1C(=O)N[C@@H]1C(=O)N2C(C(=O)[O-])C(C)(C)S[C@H]12.[Na+]
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?