CCOC(=O)c1ccc(-c2ccc(/C=C(\C#N)c3nc4cc(C)ccc4[nH]3)o2)cc1
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?