Using CC(C)[Si](Cl)(C(C)C)C(C)C, CNCC(CCO)c1ccc(Br)cc1 to produce CNCC(CCO[Si](C(C)C)(C(C)C)C(C)C)c1ccc(Br)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.