Using CCOC(=O)CCc1ccc(OCc2ccc(Oc3ccccc3)cc2)c(F)c1 to produce O=C(O)CCc1ccc(OCc2ccc(Oc3ccccc3)cc2)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.