Using CCCBr, N#Cc1ccc(-c2ccc([C@H]3CC[C@H](CCC4CC[SiH](Cl)CC4)CC3)cc2)cc1 to produce CCC[Si@H]1CC[C@H](CC[C@H]2CC[C@H](c3ccc(-c4ccc(C#N)cc4)cc3)CC2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.