Using CC(=O)OC(C)=O, FC(F)(F)COc1ccc(OCC(F)(F)F)cc1 to produce CC(=O)c1cc(OCC(F)(F)F)ccc1OCC(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.