[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a colorless liquid with a mild characteristic odor. Floats on water. (USCG, 1999)"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][Branch2][Ring1][Ring1][C][Branch1][C][C][Branch1][C][C][C][O][C][=Branch1][C][=O][C][Branch1][C][C][C][O]"}]