Using CN1C(=O)Nc2ccc(Br)cc2C1(O)c1ccccc1, NO to produce O=c1[nH]c2ccc(Br)cc2c(-c2ccccc2)[n+]1[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.