NC(=O)c1[nH]cnc1C(=O)Nc1cccc(NC(=O)c2cccc(C(F)(F)F)c2)c1
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?