Using O=C(NC(=O)c1ccccc1[N+](=O)[O-])Nc1ccc(Sc2ncc(Br)cn2)cc1 to produce Nc1ccccc1C(=O)NC(=O)Nc1ccc(Sc2ncc(Br)cn2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.