Using CC(C)[Si](Cl)(C(C)C)C(C)C, Brc1cccc2[nH]ccc12 to produce CC(C)[Si](C(C)C)(C(C)C)n1ccc2c(Br)cccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.