C[C@H]1COC(=O)[C@H](CC(=O)OC(C)(C)C)C/C=C\C[C@H](CC(=O)N(CCO)Cc2ccccc2)C(=O)N1
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?