Using CCn1c(C)nc2cc(Cl)c(Cl)cc21, C[Si](C)(C)CCCCl to produce CC[n+]1c(C)n(CCC[Si](C)(C)C)c2cc(Cl)c(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.