Using CC(=O)[O-], O=[N+]([O-])c1ccc(Cl)c(CBr)c1Cl to produce CC(=O)OCc1c(Cl)ccc([N+](=O)[O-])c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.