[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an oxacycle."}, {"from": "gpt", "value": "[C][C@@H1][C][=C][C@@H1][C@H1][Branch2][Ring1][=Branch2][C][=Branch1][C][=O][O][C@@H1][C][Ring1][#Branch1][C][Ring1][O][C][C][C@@][Branch1][Ring2][O][Ring1][#Branch1][Branch1][C][C][O][C]"}]