COc1ccc(O)c(C(=O)c2cnn(C(=O)c3cccc(S(=O)(=O)N(C)C)c3)c2)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?