Using O=C1CCC(=O)N1Br, CCc1ccc(Oc2ccc([N+](=O)[O-])cn2)cc1 to produce CC(Br)c1ccc(Oc2ccc([N+](=O)[O-])cn2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.