N#C/C(=C\c1ccc(Oc2ccc([N+](=O)[O-])cn2)cc1)C(=O)Nc1ccc(F)cc1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?