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