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| Other names | 19-Nor-4,9(10)-androstadienedione; Estradienedione, 19-Norandrosta-4,9(10)-diene-3,17-dione; Estra-4,9(10)-diene-3,17-dione |
| Routes of administration | Oral |
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| ECHA InfoCard | 100.112.341 |
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| Formula | C18H22O2 |
| Molar mass | 270.372 g·mol−1 |
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Dienedione, also known asestra-4,9-diene-3,17-dione, is asynthetic,orally activeanabolic-androgenic steroid (AAS) of the19-nortestosterone group that was never introduced for medical use. It is thought to be aprohormone ofdienolone.[1] The drug became a controlled substance in the US on January 4, 2010,[2] and is classified as a Schedule III anabolic steroid under the United StatesControlled Substances Act. Previous to this, it was sold as abodybuilding supplement within the United States, and often mistakenly marketed as aprohormone fortrenbolone, a veterinary steroid. Prior to its scheduling, it was part of a number of supplements that were seized during FDA enforcement ofBodybuilding.com for selling unapproved new drugs.[3] The actual active metabolite, dienolone, is almost identical to trenbolone structurally, but lacks the C11double bond.
Dienedione use is also prohibited in horses. In addition, small amounts are endogenously produced in horses.[4]
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