Using Br, CC1(C)C=Cc2cc(N)c([N+](=O)[O-])cc2O1 to produce CC1(C)C=Cc2cc(Br)c([N+](=O)[O-])cc2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.