[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=Branch2][Ring1][Branch2][=C][C][=Branch1][C][=O][C][/C][=Branch1][=C][=C][/C][C][C][O][C][=Branch1][C][=O][C][Ring1][=Branch1][=C][/C][C]"}, {"from": "gpt", "value": "The molecule is a butan-4-olide. It is functionally related to an alpha-methylene gamma-butyrolactone."}]