Using O=[N+]([O-])c1ccc(N(Cc2ccc(Br)cc2)n2cnnc2)cc1 to produce Nc1ccc(N(Cc2ccc(Br)cc2)n2cnnc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.