Using CCOC(=O)C1=Cc2ccc(C(C)(C)C)cc2OC1C(F)(F)C(F)(F)F to produce CC(C)(C)c1ccc2c(c1)OC(C(F)(F)C(F)(F)F)C(C(=O)O)=C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.