Using CC(C)(C)[Si](C)(C)OCCCn1ccc2c(Br)cccc21, CN(C)C=O to produce CC(C)(C)[Si](C)(C)OCCCn1ccc2c(C=O)cccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.