[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a prostanoid."}, {"from": "gpt", "value": "[C][C][C@H1][Branch2][Ring1][=Branch2][/C][=C][/C@H1][C@H1][Branch1][#Branch1][C][C][C][Ring1][Branch1][=O][C][C][C][C][C][C][C][C][=Branch1][C][=O][O][O]"}]