Using COC(=O)c1ccc(C2=NCC(c3cc(Cl)cc(Cl)c3)(C(F)(F)F)C2)cc1Cl to produce O=Cc1ccc(C2=NCC(c3cc(Cl)cc(Cl)c3)(C(F)(F)F)C2)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.