COc1ccc(N2C(=O)/C(=C\NNS(=O)(=O)c3cccc([N+](=O)[O-])c3)c3ccccc3C2=O)cc1OC
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?