Using [N-]=[N+]=[N-], CC(=O)Oc1ccc2nc(C)oc(=O)c2c1 to produce CC(=O)Oc1ccc(-n2nnnc2C)c(C(=O)O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.