[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule appears as colorless liquid with a mild pleasant odor. May float or sink in water. Freezing point is 81 \u00b0F. (USCG, 1999)"}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]