Using [N-]=[N+]=NCC1Cc2cccc(-c3c(Cl)cc(Cl)cc3Cl)c2O1 to produce NCC1Cc2cccc(-c3c(Cl)cc(Cl)cc3Cl)c2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.