COC(=O)[C@@H](Cc1ccccc1)NC(=O)CC[C@H]1O[C@@H](n2cc(C)c(=O)[nH]c2=O)C[C@@H]1O
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?