Using COCc1ccc(C(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)c([N+](=O)[O-])c1 to produce COCc1ccc(C(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)c(N)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.