Using CC(C)(C)[Si](C)(C)OCCC(c1ccccc1)n1nc([N+](=O)[O-])nc1Br to produce O=[N+]([O-])c1nc2n(n1)C(c1ccccc1)CCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.