O=C(Nc1ccc(F)cc1F)N1CCCC(c2nc(-c3ccc(F)cc3)no2)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?