Using CC(C)(Br)C(=O)Br, COC(=O)c1cc(N)c(O)cc1C(F)(F)F to produce COC(=O)c1cc(NC(=O)C(C)(C)Br)c(O)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.