COc1ccc(NC(=O)[C@@H]2[C@@H]3C(=O)N(C4CCCCC4)C(=O)[C@@H]3C3c4ccccc4C=CN32)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?