Using O=[N+]([O-])c1cnc2ccccc2c1NCCCCCC(O)c1ccccc1 to produce O=C(CCCCCNc1c([N+](=O)[O-])cnc2ccccc12)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.