Using O=[N+]([O-])c1ccccc1N1CC2(CCNCC2)c2ccc(Cl)cc21 to produce Nc1ccccc1N1CC2(CCNCC2)c2ccc(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.