Using CCOC(C)=O, COc1cc(Br)cc(CO[Si](C(C)C)(C(C)C)C(C)C)c1OC to produce COc1cc(C=O)cc(CO[Si](C(C)C)(C(C)C)C(C)C)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.