Using O=C1c2ccccc2C(=O)N1CCCn1ccc2cc([N+](=O)[O-])ccc21 to produce Nc1ccc2c(ccn2CCCN2C(=O)c3ccccc3C2=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.