Using CN(C)C=O, CC(C)(C)[Si](OC1CCNc2nc(Br)ccc21)(c1ccccc1)c1ccccc1 to produce CC(C)(C)[Si](OC1CCNc2nc(C=O)ccc21)(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.