Using O=C1CCC(=O)N1Br, Cc1ccc(N(C(=O)C(C)(C)C)C(=O)C(C)(C)C)cc1OCC(F)(F)F to produce CC(C)(C)C(=O)N(C(=O)C(C)(C)C)c1ccc(CBr)c(OCC(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.