[{"from": "human", "value": "Provide a description 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,4R-diastereomer). It is a butan-4-olide and a diol."}]