CC(=O)O[C@]1(C(C)=O)CCC2C3CCC4=CC(=O)CCC4(C)C3(F)C(O)CC21C
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?