COc1ccc(N2C(=O)/C(=C\NNS(=O)(=O)c3ccc(C)c([N+](=O)[O-])c3)c3ccccc3C2=O)cc1OC
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?