Using [Cl-], O=C(Cl)c1cc([N+](=O)[O-])ccc1Cl to produce O=C(c1ccccc1)c1cc([N+](=O)[O-])c(Cl)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.