Using COc1cc(Cl)nnc1Oc1ccccc1C(C)(C)C, C[Si](C)(C)Cl to produce COc1c(Oc2ccccc2C(C)(C)C)nnc(Cl)c1[Si](C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.