Using O=C1CCC(=O)N1Br, Cc1cc(-c2ccccc2)cc([N+](=O)[O-])c1 to produce O=[N+]([O-])c1cc(CBr)cc(-c2ccccc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.