[{"from": "human", "value": "Generate a molecule based on this description. The molecule is an oxacycle."}, {"from": "gpt", "value": "[C][C][Branch2][Ring1][O][C][C][C][Ring1][Ring2][C][C][C][Branch1][S][C][=Branch1][C][=O][C][C][C][Ring1][#Branch2][Branch1][Ring2][O][Ring1][#Branch1][C][C][C]"}]