Cc1nn(C(C)(C)C)c(C)c1/C=N/OC(=O)Nc1ccc(Cl)c(Cl)c1
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?