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