[{"from": "human", "value": "Please give me some details about 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][Branch1][#Branch2][C][C][C][=Branch1][C][=O][C][Ring1][#Branch1][C]"}, {"from": "gpt", "value": "The molecule is a prohormone of testosterone. In the United States, the Controlled Substance Act is inclusive to anabolic steroids and their precursors. Thus 5-androstenedione is a controlled substance, and its use in athletes is prohibited by The World Anti-Doping Agency. Apart from the positioning of a carbon-carbon double bond, its structure is similar to [4-androstenedione], which is a prohormone which is naturally produced in the body by the adrenal glands and gonads, and acts as precursor to testosterone, as well as estrone and estradiol."}]