Using COC(=O)c1c(CCNc2ccc(C(C)(C)C)cc2)cccc1[N+](=O)[O-] to produce CC(C)(C)c1ccc(N2CCc3cccc([N+](=O)[O-])c3C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.