Using CCOC(=O)COc1ccc(O)cc1C(=O)NCc1ccc(Br)cc1F to produce O=C(O)COc1ccc(O)cc1C(=O)NCc1ccc(Br)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.