Using O=[N+]([O-])c1ccc(Cl)c(-c2cn3cc(Br)cnc3n2)c1 to produce Nc1ccc(Cl)c(-c2cn3cc(Br)cnc3n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.