CCOC(=O)c1nn(-c2ccc(Cl)cc2)c2nc(Nc3ccccc3)cc(=O)n12
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?