O=C(O)c1ccc(S(=O)(=O)c2ccc3c(c2)C(=O)N(NC(=O)c2cccnc2)C3=O)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?