[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is also known as methyl chloride. It is a clear, colorless gas. It has a faint, sweet odor that is noticeable only at levels that may be toxic. It is heavier than air, and it is extremely flammable."}, {"from": "gpt", "value": "[C][Cl]"}]