Using COc1cc(OC)cc(C(O)c2ccc(OC)c(O[Si](C)(C)C(C)(C)C)c2)c1 to produce COc1cc(OC)cc(C(=O)c2ccc(OC)c(O[Si](C)(C)C(C)(C)C)c2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.