[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a colorless highly flammable liquid that evaporates quickly when exposed to the air. It has a sharp, strong odor. Methyl isocyanate is used in the production of pesticides, polyurethane foam, and plastics."}, {"from": "gpt", "value": "[C][N][=C][=O]"}]