CCc1ccccc1NC(=O)c1cc2nc(-c3ccc(OC)c(OC)c3)cc(C(F)(F)F)n2n1
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?