Using O=c1[nH]c2ccc([N+](=O)[O-])cc2c(=O)n1CCCCn1ccnc1 to produce Nc1ccc2[nH]c(=O)n(CCCCn3ccnc3)c(=O)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.