[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a prostanoid."}, {"from": "gpt", "value": "[2H][C][Branch1][C][2H][Branch1][#Branch1][C][C][=Branch1][C][=O][O][C][Branch1][C][2H][Branch1][C][2H][/C][=C][\\C][C@@H1][C@H1][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][C][Ring1][Branch1][=O][O][/C][=C][/C@H1][Branch1][=Branch1][C][C][C][C][C][O]"}]