COc1ccc(N(C)S(=O)(=O)c2cccc(C(=O)Nc3nc(C)c(C(C)=O)s3)c2)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?