C[C@](N)(Cc1ccc(O)c(O)c1)C(=O)O.C[C@](N)(Cc1ccc(O)c(O)c1)C(=O)O.O.O.O
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?