Using CC(=O)OCCc1cc(S(=O)(=O)Cl)c2ccccc2c1Br, O=[N+]([O-])O to produce CC(=O)OCCc1cc(S(=O)(=O)Cl)c2c([N+](=O)[O-])cccc2c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.