CCOC(=O)C1CCCN(C(=O)CNC(=O)c2nn(-c3ccc(OC)c(Cl)c3)c(=O)c3ccccc23)C1
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?