COc1cc2c(cc1OC)CN(CC(=O)Nc1ccc(Cl)c(S(=O)(=O)N(C)C)c1)CC2
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?