Using O=N[O-], CCCOc1ccccc1-c1nc2cc(N)c(N)cc2c(=O)[nH]1 to produce CCCOc1ccccc1-c1nc2cc3nn[nH]c3cc2c(=O)[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.