Using CC(C)(C)OC(=O)c1cc(Cl)c(F)cc1F, OCC12CCCCC1C2 to produce CC(C)(C)OC(=O)c1cc(Cl)c(OCC23CCCCC2C3)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.