Using COC(=O)CCc1ccc(OCc2ccc(-c3ccc(C(F)(F)F)cc3)s2)cc1C to produce Cc1cc(OCc2ccc(-c3ccc(C(F)(F)F)cc3)s2)ccc1CCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.