CC(=O)OC1CC(OC(C)=O)[C@]2(C)C(CC(OC(C)=O)[C@]3(C)C2CC[C@@]2(C)C(c4ccoc4)C(=O)C4O[C@@]423)C1(C)C
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?