Cc1nn2c(=O)cc(COc3ccc(/C=C(\C#N)C(=O)Nc4ccccc4C)cc3)nc2s1
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?