Using CC(C)(C)[Si](C)(C)OCCO, CC(C)(C)Oc1ccc(O)cc1 to produce CC(C)(C)Oc1ccc(OCCO[Si](C)(C)C(C)(C)C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.