CC(C)(C)c1ccc(Oc2nc3ccccn3c(=O)c2/C=C(\C#N)c2nc3ccccc3[nH]2)cc1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?