CC(NNC(=O)CC(=O)N(C(=O)c1ccccc1)c1ccc(Cl)cc1)c1cc2ccccc2oc1=O
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?