[{"from": "human", "value": "Describe this molecule. [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]"}, {"from": "gpt", "value": "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."}]