CN(CC(=O)Nc1ccccc1Cl)C(=O)COC(=O)c1nc(Cl)c(Cl)c(Cl)c1Cl
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?