[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule appears as a colorless to pale yellow liquid with a pleasant odor. Less dense than water. Flash point 111 \u00b0F. Vapors heavier than air. Used to make nylon, as a chemical reaction medium, and as a solvent."}, {"from": "gpt", "value": "[C][C][C][C][=Branch1][C][=O][C][C][Ring1][#Branch1]"}]