Using O=C(Oc1cccc2c(OC(=O)c3ccc([N+](=O)[O-])cc3)cccc12)c1ccc([N+](=O)[O-])cc1 to produce Nc1ccc(C(=O)Oc2cccc3c(OC(=O)c4ccc(N)cc4)cccc23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.