[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule appears as a colorless volatile liquid. Flash point 22 \u00b0F. Slightly soluble in water and denser than water. Toxic by inhalation and ingestion. A strong skin irritant. Used to make rubber."}, {"from": "gpt", "value": "[C][C][Branch1][Ring2][O][Ring1][Ring1][C][Br]"}]