Using CC(C)CBr, C=CCC[Si](c1ccccc1)(c1ccccc1)C1SCCCS1 to produce C=CCC[Si](c1ccccc1)(c1ccccc1)C1(CC(C)C)SCCCS1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.