Using Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl, O=C1CC[C@@H](C(=O)O)N1 to produce O=C1CC[C@@H](C(=O)Oc2c(Cl)c(Cl)c(Cl)c(Cl)c2Cl)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.