[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is an oxacycle."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C@@H1][C@H1][Branch2][Ring1][#Branch2][C][C@][Branch1][P][O][C@H1][Ring1][=Branch1][C][Branch1][Ring2][O][Ring1][Branch1][C][Branch1][Ring1][C][O][O][C][=Branch1][C][=O][O][O]"}]