Using O=[N+]([O-])O, O=C(NCCCCN1CCCC1)c1cc(Oc2ccc(O)cc2)ccn1 to produce O=C(NCCCCN1CCCC1)c1cc(Oc2ccc(O)c([N+](=O)[O-])c2)ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.