[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule appears as a colorless liquid that discolors in air. Denser than water. The vapors are heavier than air. May be mildly toxic by inhalation. Used as a solvent and to make pharmaceuticals."}, {"from": "gpt", "value": "[C][C][C][I]"}]