Using O=C(O)CN1CC(c2ccc(Cl)cc2)CC1=O, Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl to produce O=C(CN1CC(c2ccc(Cl)cc2)CC1=O)Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.