COc1ccc(S(=O)(=O)NCc2cc(=O)n(C)c(=O)n2C)cc1C
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?