Using ON=C(Cl)c1ccc(OC(F)(F)F)cc1, COC(=O)CC(C)=O to produce COC(=O)c1c(-c2ccc(OC(F)(F)F)cc2)noc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.