Using CC(CO)(COCc1cc(C(F)(F)F)cc(C(F)(F)F)c1)c1ccccc1 to produce CC(C=O)(COCc1cc(C(F)(F)F)cc(C(F)(F)F)c1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.