Using O=C(Nc1cc(Cl)ccc1C(=O)c1ccc(F)cc1)c1ccccc1, COC(=O)CBr to produce COC(=O)c1[nH]c2cc(Cl)ccc2c1-c1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.