[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an L-altropyranose in which the carbon bearing the anomeric hydroxy group has alpha configuration. It is an enantiomer of an alpha-D-altropyranose."}, {"from": "gpt", "value": "[C][Branch2][Ring1][Branch1][C@H1][C@@H1][Branch1][S][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C@@H1][Branch1][Ring2][O][Ring1][=Branch1][O][O][O][O][O]"}]