O=C(O)c1ccc2c(c1)C(=O)N([C@H](Cc1ccc(O)c(O)c1)C(=O)O)C2=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?