[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule appears as a colorless liquid with a pungent odor. Very toxic by ingestion. May be toxic by skin absorption and inhalation. Insoluble in water but reacts with water to produce a toxic vapor. Used to make other chemicals."}, {"from": "gpt", "value": "[C][C][C][N][=C][=O]"}]