Using BrBr, CC1(C)OC(=O)Nc2ccc(-c3cc(F)cc(C#N)c3)cc21 to produce CC1(C)OC(=O)Nc2c(Br)cc(-c3cc(F)cc(C#N)c3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.