[{"from": "human", "value": "What can you tell me about this molecule? [C][=N+1][=N-1]"}, {"from": "gpt", "value": "The molecule is the simplest diazo compound, in which a diazo group is attached to a methylene group. It has a role as an alkylating agent, an antineoplastic agent, a carcinogenic agent and a poison."}]