Using CC(C)(C)[Si](C)(C)O[C@H]1COCC[C@@H]1n1cnc2c(cc(Br)c3ccccc32)c1=O to produce CC(C)(C)[Si](C)(C)O[C@H]1COCC[C@@H]1N1CNc2c(cc(Br)c3ccccc23)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.