[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C][=Branch1][C][=O][O][Ring1][=Branch1][O][O]"}, {"from": "gpt", "value": "The molecule is a butan-4-olide that is dihydrofuran-2-one substituted at C-3 and C-4 by hydroxy groups (the 3R,4S-diastereomer). It has a role as a metabolite. It is a butan-4-olide and a diol. It is an enantiomer of a D-threonolactone."}]