Using O=N[O-], CC(=O)NCCNc1ccc(C2=NNC(=O)CC2)cc1N to produce CC(=O)NCCn1nnc2cc(C3=NNC(=O)CC3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.