Using COc1ccc(-c2cc(CO)c(=O)n(CC3CC3)n2)cc1F, BrC(Br)(Br)Br to produce COc1ccc(-c2cc(CBr)c(=O)n(CC3CC3)n2)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.