[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a ketal."}, {"from": "gpt", "value": "[C][C][Branch2][Ring1][#C][O][C@@H1][C@H1][Branch1][P][C@H1][Branch1][Branch2][O][C][Ring1][Branch1][O][Ring1][Branch2][C][Branch1][Ring1][C][O][O][O][C][C][C][N][Branch1][C][C][C][C]"}]