Using O=C(Nc1ccccc1)c1cc2cc([N+](=O)[O-])ccc2n1CCc1ccccc1 to produce Nc1ccc2c(c1)cc(C(=O)Nc1ccccc1)n2CCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.