[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a colorless oily liquid with a weak oily odor. Solidifies (freezing point is 79 \u00b0F) and sinks on first contact with water, then mixes with water. (USCG, 1999)"}, {"from": "gpt", "value": "[C][C][C][S][=Branch1][C][=O][=Branch1][C][=O][C][Ring1][#Branch1]"}]