Using COC(=O)c1cc([N+](=O)[O-])cc(OC(=O)c2ccccc2)c1OCCBr to produce COC(=O)c1cc([N+](=O)[O-])cc2c1OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.