COc1ccc(-n2c(NC(=O)c3ccco3)c(C#N)c3nc4ccccc4nc32)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?