Using O=C1CCC(=O)N1Br, COC1(c2ccc(C(F)(F)F)cc2CO)CCCCC1 to produce COC1(c2ccc(C(F)(F)F)cc2CBr)CCCCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.