Using CCCCBr, O=C(c1cccc([N+](=O)[O-])c1)c1ccc[nH]1 to produce CCCCn1cccc1C(=O)c1cccc([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.