C=C(C)[C@H]1Cc2oc(cc2C(=O)OC)[C@H](C(=C)C)[C@H]2C=C(C(=O)O2)[C@H](O)[C@@H]1O
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?