Using O=[N+]([O-])c1ccc(O)cc1, CCCCCc1c(/C=C/C(=O)O)oc2cc(OC)ccc12 to produce CCCCCc1c(/C=C/C(=O)Oc2ccc([N+](=O)[O-])cc2)oc2cc(OC)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.