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