CC(=O)OCC1OC(N2C(=O)[C@@H](Oc3ccccc3)[C@H]2/C=C/c2ccccc2)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?