Using COCCCOc1cc(C(C)O)ccc1O[Si](C(C)C)(C(C)C)C(C)C to produce COCCCOc1cc(C(C)=O)ccc1O[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.