Using COC(=O)c1cc2cc(COC(C)=O)cc([N+](=O)[O-])c2n1C(=O)OC(C)(C)C to produce COC(=O)c1cc2cc(COC(C)=O)cc([N+](=O)[O-])c2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.