C[C@@H](c1ccccc1)N1C(=O)[C@H]2CC[C@@H]3/C(=N\OCc4ccccc4)C[C@@H](O)[C@@H](O)[C@@H]3[C@@H]2C1=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?