CNS(=O)(=O)c1cn(CC(=O)NCc2ccc(N(C)C)cc2)cc1S(=O)(=O)NC
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?