CCN(CC(=O)Nc1ccc(C(C)=O)cc1)CC(=O)Nc1ccccc1C(F)(F)F
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?