[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a prostanoid."}, {"from": "gpt", "value": "[C][C][C][C][C][/C][=C][/C][=C][\\C@H1][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][C][/-Ring1][Branch1][=O][O][C][/C][=C][\\C][C][C][C][C][C][=Branch1][C][=O][O]"}]