Using CCOC(=O)CCl, O=[N+]([O-])c1cccc2[nH]nc(Br)c12 to produce CCOC(=O)Cn1nc(Br)c2c([N+](=O)[O-])cccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.