Using BrBr, Cn1nc(-c2ccc(C(F)(F)F)cc2)cc1C(C)(C)O[SiH2]C(C)(C)C to produce Cn1nc(-c2ccc(C(F)(F)F)cc2)c(Br)c1C(C)(C)O[SiH2]C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.