CC1=NN(C(=O)c2ccc(Cl)cc2)C(=O)/C1=C/c1c(O)cc(O)c2ccccc12
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?