[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a member of propane-1,3-diols."}, {"from": "gpt", "value": "[C][O][C][=C][Branch2][Ring2][C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][Branch1][Ring1][C][O][C][Branch1][P][C][=C][C][=Branch1][#Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][C][O][C][O][O][C]"}]