Using COC(O[Si](C)(C)C)=C(C)C, CC(C)(C)c1cc(Br)c(O)cc1[N+](=O)[O-] to produce COC(=O)C(C)(C)c1cc(C(C)(C)C)c([N+](=O)[O-])cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.