Using CC=CCBr, CCOC(=O)CC(=O)c1cccc([N+](=O)[O-])c1 to produce CC=CCC(C(=O)OCC)C(=O)c1cccc([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.