Using CCOC(=O)COc1ccc(Cl)c(NCc2cc(-c3cccc(F)c3)ccc2F)c1F to produce O=C(O)COc1ccc(Cl)c(NCc2cc(-c3cccc(F)c3)ccc2F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.