O=C1C=C(Nc2ccccc2C(=O)CC(=O)C(=O)Nc2cccc(C(F)(F)F)c2)c2ccccc2C1=O
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?