COC(=O)C1=C[C@@H](C(=O)OC)[C@@H]2C3=C(C(=O)[C@@]2(C)NC(=O)c2ccccc2)[C@H](c2ccccc2)[C@@H]2C(=O)NC(=O)[C@@H]2[C@@H]3C1
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?