Using OCCc1ccc(C(F)(F)F)cc1, COC(=O)c1cc(F)ccc1O to produce COC(=O)c1cc(F)ccc1OCCc1ccc(C(F)(F)F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.