Using C=CCBr, COC(=O)C(C(=O)OC)C(Cc1ccccc1[N+](=O)[O-])c1ccc(OC)cc1 to produce C=CCC(C(=O)OC)(C(=O)OC)C(Cc1ccccc1[N+](=O)[O-])c1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.