Using O=C(Br)CBr, CC(C)(CNc1cc(F)ccc1Cl)NC(=O)OC(C)(C)C to produce CC(C)(CN(C(=O)CBr)c1cc(F)ccc1Cl)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.