COc1ccc(C(=O)Nc2nc3n(n2)C(c2ccc(F)cc2)C=C(c2ccc(Cl)cc2)N3)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?