CO[C@@H]1COC(=O)C/C=C\[C@H](C)[C@@H](OC)COC(=O)[C@@H](C)NC(=O)C/C=C\[C@H]1C
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?