[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an acetylenic fatty acid that is octanoic acid (caprylic acid) which has been doubly dehydrogenated at positions 2 and 3 to give the corresponding alkynoic acid. It is widely used in perfumes, lipstick, and many common food flavourings. It is a monounsaturated fatty acid and an acetylenic fatty acid."}, {"from": "gpt", "value": "[C][C][C][C][C][C][#C][C][=Branch1][C][=O][O]"}]