O=C([O-])CC[C@@H](NC(=O)c1ccccc1C(=O)[O-])C(=O)[O-].[Na+].[Na+].[Na+]
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?