CCC(C(=O)C(C)C(O)C(C)CCc1ccc(C)c(O)c1C(=O)[O-])C1OC(CC)(C2CC[C@@](O)(CC)C(C)O2)CC1C.[Na+]
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?