[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is the pyranose form of L-altrose. It is a L-altrose and an altropyranose. It is an enantiomer of a D-altropyranose."}, {"from": "gpt", "value": "[C][Branch2][Ring1][Branch1][C@H1][C@@H1][Branch1][S][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C][Branch1][Ring2][O][Ring1][=Branch1][O][O][O][O][O]"}]