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