Using CC(C)(C)[Si](C)(C)Cl, Cn1c(CO)cc2cc(Br)ccc21 to produce Cn1c(CO[Si](C)(C)C(C)(C)C)cc2cc(Br)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.