[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a prostanoid."}, {"from": "gpt", "value": "[C][C@H1][Branch2][Ring1][S][C][C][C][C@@H1][Branch2][Ring1][Branch2][/C][=C][/C@H1][C][=C][C][=Branch1][C][=O][C@@H1][Ring1][=Branch1][C][/C][=C][\\C][C][C][C][=Branch1][C][=O][O][O][O]"}]