CCOC(=O)CCC(C(=O)OCC)n1nc2ccc(Nc3c(C)[n+]([O-])c4cc(Cl)ccc4[n+]3[O-])cc2n1
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?