[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule appears as colorless liquid that is odorless or has a mild sweet odor. May float or sink in water. (USCG, 1999)"}, {"from": "gpt", "value": "[C][C][Branch1][Ring1][C][O][O][C][C][Branch1][C][C][O]"}]