C=C(N(C)C)[C@]1(C)C[C@H]1[C@H](NC(=O)CNC(=O)OCc1ccccc1)c1ccccc1
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?