CCC(=O)O[C@@]1(C(=O)CCl)[C@@H](C)C[C@@H]2[C@H]3CCC4=CC(=O)C=C[C@@]4(C)[C@]3(F)[C@@H](O)C[C@@]21C
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?