Using CCOC(=O)CC(=O)Nc1ccc([N+](=O)[O-])cc1, BrCCBr to produce CCOC(=O)C1(C(=O)Nc2ccc([N+](=O)[O-])cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.