O=C(c1ccc(Cn2cc(Br)cn2)o1)N1N=C(C(F)F)CC1(O)C(F)F
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?