Using CN(C)C=O, COCc1cc(Br)cc(CO[Si](C)(C)C(C)(C)C)c1 to produce COCc1cc(C#N)cc(CO[Si](C)(C)C(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.