Using COCCl, C=CCC1=CC(O[Si](C)(C)C(C)(C)C)CC1(C)O to produce C=CCC1=CC(O[Si](C)(C)C(C)(C)C)CC1(C)OCOC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.