C=C1C(=O)OC2/C=C(\COC(C)=O)CCC(OC(C)=O)C3=CC(OC3=O)C12
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?