Using OB(O)c1ccc2ccccc2c1, COc1ccc2nc(Br)sc2c1[N+](=O)[O-] to produce COc1ccc2nc(-c3ccc4ccccc4c3)sc2c1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.