Using COC(=O)C(NC(=O)OCc1ccc([N+](=O)[O-])cc1)OC to produce COC(NC(=O)OCc1ccc([N+](=O)[O-])cc1)C(=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.