Using CC(=O)c1ccc(Oc2ccc(Cl)c(C(F)(F)F)c2)cc1 to produce CC(O)c1ccc(Oc2ccc(Cl)c(C(F)(F)F)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.