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Bolandione, also known as 19-norandrostene … Bolandione, also known as 19-norandrostenedione, as well as 19-norandrost-4-en-3,17-dione or estr-4-ene-3,17-dione, is a precursor of the anabolic-androgenic steroid (AAS) nandrolone (19-nortestosterone). Until 2005, bolandione was available without prescription in United States, where it was marketed as a prohormone, but it is now classified as a Schedule III drug. It is also banned from use in many sports, including the Olympic Games, under the World Anti-Doping Code. Bolandione is readily metabolized to nandrolone after oral administration, but its potency to transactivate the androgen receptor dependent reporter gene expression is 10 times lower as compared to dihydrotestosterone (DHT). Scientific studies have shown that oral administration of bolandione is "a very ineffective strategy for stimulating skeletal muscle mass increases but may be associated with side effects". In vivo experiments in castrated rats demonstrated that subcutaneous treatment with bolandione resulted only in a stimulation of the weight of the levator ani muscle, while the prostate and seminal vesicle weights remained completely unaffected. In contrast to its metabolite nandrolone, bolandione highly selectively stimulates the growth of the skeletal muscles but has only weak androgenic properties. In the early 2000s, contamination of androstenedione products with traces of bolandione caused false positives for doping tests for nandrolone because 19-norandrosterone is a metabolite of both nandrolone and bolandione. In a randomized controlled trial trace contamination of androstenedione with bolandione was sufficient for users of androstenedione to test positive for nandrolone. This detail became less relevant after bolandione and 4-androstenedione were banned by major sporting bodies.ione were banned by major sporting bodies.
, 19-去甲-4-雄烯二酮（英語：19-norandrostenedione，也被称为 … 19-去甲-4-雄烯二酮（英語：19-norandrostenedione，也被称为Bolandione，19-去甲雄甾-4-烯-3,17-二酮，19-norandrost-4-en-3,17-dione 或雌-4-烯-3,17-二酮，estr-4-ene-3,17-dione）是同化類固醇（AAS）19-去甲睾酮（诺龙）的前体物质。世界反運動禁藥機構将其列为兴奋剂，禁止在奥林匹克运动会与其它运动会中使用。Bolandione进入人体后，会很快代谢为19-去甲睾酮，但其对雄激素受体依赖性基因表达的影响比双氢睾酮（DHT）低了10倍。19-去甲睾酮，但其对雄激素受体依赖性基因表达的影响比双氢睾酮（DHT）低了10倍。
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19-去甲-4-雄烯二酮（英語：19-norandrostenedione，也被称为 … 19-去甲-4-雄烯二酮（英語：19-norandrostenedione，也被称为Bolandione，19-去甲雄甾-4-烯-3,17-二酮，19-norandrost-4-en-3,17-dione 或雌-4-烯-3,17-二酮，estr-4-ene-3,17-dione）是同化類固醇（AAS）19-去甲睾酮（诺龙）的前体物质。世界反運動禁藥機構将其列为兴奋剂，禁止在奥林匹克运动会与其它运动会中使用。Bolandione进入人体后，会很快代谢为19-去甲睾酮，但其对雄激素受体依赖性基因表达的影响比双氢睾酮（DHT）低了10倍。19-去甲睾酮，但其对雄激素受体依赖性基因表达的影响比双氢睾酮（DHT）低了10倍。
, Bolandione, also known as 19-norandrostene … Bolandione, also known as 19-norandrostenedione, as well as 19-norandrost-4-en-3,17-dione or estr-4-ene-3,17-dione, is a precursor of the anabolic-androgenic steroid (AAS) nandrolone (19-nortestosterone). Until 2005, bolandione was available without prescription in United States, where it was marketed as a prohormone, but it is now classified as a Schedule III drug. It is also banned from use in many sports, including the Olympic Games, under the World Anti-Doping Code. Bolandione is readily metabolized to nandrolone after oral administration, but its potency to transactivate the androgen receptor dependent reporter gene expression is 10 times lower as compared to dihydrotestosterone (DHT). as compared to dihydrotestosterone (DHT).
|
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Bolandione
, 19-去甲-4-雄烯二酮
|
