Using [N-]=[N+]=[N-], CCCC1=CC(=O)c2oc(Cc3ccc(OC)cc3)c(C)c2C1=O to produce CCCC1=C(N)C(=O)c2oc(Cc3ccc(OC)cc3)c(C)c2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.