Using CCOC(=O)C(C)Oc1cccc(Oc2c(Cl)cc(C(F)(F)F)cc2Cl)c1 to produce CC(Oc1cccc(Oc2c(Cl)cc(C(F)(F)F)cc2Cl)c1)C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.