CC(=O)OCC(=O)[C@@]1(O)CC[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; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?