CCN1C(=O)[C@H]2NN=C(C(=O)c3cnccn3)[C@H]2C1=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?