CCOc1ccc(NC(=O)C(c2ccccn2)N(C(=O)CCl)c2ccc(F)cc2)cc1
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?