Using Brc1ccc(-c2ccccc2)cc1, ClC(Cl)C[Si](Cl)(Cl)Cl to produce Cl[Si](Cl)(Cl)CC1c2ccccc2-c2ccc(Br)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.