Using CCOC(C)=O, O=CC1(c2cccc(C(F)(F)F)c2)CCOCC1 to produce CCOC(=O)C=CC1(c2cccc(C(F)(F)F)c2)CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.