[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a prostanoid."}, {"from": "gpt", "value": "[C][C][C][C][C][C@@H1][Branch2][Ring1][P][/C][=C][/C@@H1][C@H1][Branch2][Ring1][=Branch2][C][C][=Branch1][C][=O][C@H1][Ring1][=Branch1][C][C][C][Branch1][Ring2][O][Ring1][Ring1][C][C][C][C][=Branch1][C][=O][O][O][O]"}]