[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is one of three naturally occurring estrogens synthesized from androstenedione in the adrenal glands and peripheral tissues by aromatization and is the primary estrogen produced after menopause."}, {"from": "gpt", "value": "[C][C@][C][C][C@H1][C@H1][Branch1][#Branch2][C@@H1][Ring1][=Branch1][C][C][C][Ring1][=Branch2][=O][C][C][C][=C][Ring1][O][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][O]"}]