CC(=O)Nc1ccc(C=NNc2ccc([N+](=O)[O-])cc2S(=O)(=O)Nc2ccccc2C(=O)O)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?