[{"from": "human", "value": "Could you provide a description of this molecule? [C][=C][N][=C][Branch1][Branch1][C][=N][Ring1][=Branch1][N][N][=O]"}, {"from": "gpt", "value": "The molecule is a congener of pyridine 2-diazohydroxide.  Pyrazine diazohydroxide forms DNA adducts via the reactive pyrazine diazonium ion, thereby inhibiting DNA synthesis. (NCI04)"}]