C=C(C)C(=O)N1CC2(CC(c3cccc(NC(=O)COc4ccc(Cl)cc4)c3)=NO2)C[C@@H]1C(N)=O
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 pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?