O=C(C1=NN[C@@H]2C(=O)N(c3cccc(C(F)(F)F)c3)C(=O)[C@H]12)c1ccc2ccccc2n1
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?