[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][C][=Branch1][C][=O][O][C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is a butan-4-olide that is tetrahydrofuran substituted by an oxo group at position 2. It has a role as a neurotoxin and a metabolite."}]