Using COC(=O)C(C)(C)CO, CC(C)[Si](Cl)(C(C)C)C(C)C to produce COC(=O)C(C)(C)CO[Si](C(C)C)(C(C)C)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.