Using Nc1ccc(Cl)c(Cl)c1, O=C(O)c1cc[n+]([O-])cc1 to produce O=C(Nc1ccc(Cl)c(Cl)c1)c1cc[n+]([O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.