O=C1CC(N2CCN(c3cccc(C(F)(F)F)c3)CC2)C(=O)N1c1ccc(F)cc1
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?