[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is the L-stereoisomer of threose; a major in vivo degradation product of ascorbate."}, {"from": "gpt", "value": "[C][Branch1][O][C@@H1][Branch1][#Branch1][C@H1][Branch1][Ring1][C][=O][O][O][O]"}]