CS/C(=N\Nc1cnc2ccccc2n1)NS(=O)(=O)c1cc(C)c(Cl)cc1Cl
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?