[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a ketal."}, {"from": "gpt", "value": "[C][C][C@@][Branch1][P][O][C][C@@H1][Branch1][Ring2][O][Ring1][Branch1][C@@H1][C][C][C][C][N][Ring1][=Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]