Using CCC(CC)COc1c(Cl)cc2c(c1C)OC(C(F)(F)F)C(C(=O)OC)=C2 to produce CCC(CC)COc1c(Cl)cc2c(c1C)OC(C(F)(F)F)C(C(=O)O)=C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.