Using O=C1c2ccccc2C(=O)N1C1CCc2[nH]c3ccc([N+](=O)[O-])cc3c2C1 to produce Nc1ccc2[nH]c3c(c2c1)CC(N1C(=O)c2ccccc2C1=O)CC3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.