CCN(C[C@H]1N[C@@](Cc2ccccc2)(C(=O)OC)[C@H]2C(=O)N(Cc3ccccc3)C(=O)[C@@H]12)C(=O)Nc1ccc(Cl)cc1.O=C(O)C(F)(F)F
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?