CC(C)N(C(=O)[C@H]1CC(CC(=O)NCc2ccco2)C(=O)N2CCc3c([nH]c4ccccc34)[C@]12C)C(C)C
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?