[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a heterocyclic fatty acid."}, {"from": "gpt", "value": "[C][C][=C][Branch1][S][O][C][=Branch1][Branch1][=C][Ring1][Branch1][C][/C][=C][/C][=Branch1][C][=O][O][C][C][C][=Branch1][C][=O][O]"}]