Using O=C(c1c(O)c2cc([N+](=O)[O-])cc3c2n(c1=O)CCO3)N1CCc2ccccc21 to produce Nc1cc2c3c(c1)c(O)c(C(=O)N1CCc4ccccc41)c(=O)n3CCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.