Cc1ccc(S(=O)(=O)NC(=O)NC2=NC(C)(C)N(c3ccc(Cl)c(Cl)c3)C(N)=N2)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?