CC[C@@H]1CN2C(=O)N(C)c3nc(-c4cc(Cl)cc(Cl)c4Cl)[nH]c3C2=N1
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?