Using COC(=O)CC(=O)C(C)C, ON=C(Cl)Cc1c(Cl)cccc1Cl to produce COC(=O)c1c(Cc2c(Cl)cccc2Cl)noc1C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.