[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. Insoluble in water and less dense than water. Contact may cause irritate skin, eyes, and mucous membranes. May be toxic by ingestion."}, {"from": "gpt", "value": "[C][=C][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]