Using O=C(O)C[C@H](NC(=O)c1cc([N+](=O)[O-])cc([N+](=O)[O-])c1)c1ccccc1, O=C1CCC(=O)N1O to produce O=C(C[C@H](NC(=O)c1cc([N+](=O)[O-])cc([N+](=O)[O-])c1)c1ccccc1)ON1C(=O)CCC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.