O=C(CSc1nc(-c2cccs2)cc(C(F)(F)F)n1)Nc1cc(OCC(F)(F)C(F)F)cc([N+](=O)[O-])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?