Using NC(CCOCc1ccccc1)C(=O)O, O=C(Cl)c1ccc(Br)cc1F to produce O=C(NC(CCOCc1ccccc1)C(=O)O)c1ccc(Br)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.