Using OB(O)c1cccnc1, COC(=O)c1cc(Br)cc([N+](=O)[O-])c1N to produce COC(=O)c1cc(-c2cccnc2)cc([N+](=O)[O-])c1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.