Using COC(=O)C(C)(c1ccccc1)c1cc(Br)ccc1[N+](=O)[O-] to produce CC1(c2ccccc2)C(=O)Nc2ccc(Br)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.