Enobosarm
Systematic (IUPAC) name | |
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((2S)-3-(4-cyanophenoxy)-N-[4-cyano-3-(trifluoromethyl)phenyl]-2-hydroxy-2-methylpropanamide)
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Clinical data | |
Legal status |
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Routes of administration |
Oral |
Pharmacokinetic data | |
Biological half-life | 24 hours[citation needed] |
Identifiers | |
CAS Number | 841205-47-8 |
ATC code | none |
PubChem | CID: 10181786 |
ChemSpider | 9501667 |
Chemical data | |
Formula | C19H14F3N3O3 |
Molecular mass | 389.33 g/mol |
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Physical data | |
Melting point | 70 to 74 °C (158 to 165 °F) |
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Enobosarm ((2S)-3-(4-cyanophenoxy)-N-[4-cyano-3-(trifluoromethyl)phenyl]-2-hydroxy-2-methylpropanamide) (also known as ostarine, GTx-024, and MK-2866) is an investigational selective androgen receptor modulator (SARM) from GTX, Inc for treatment of conditions such as muscle wasting and osteoporosis, formerly under development by Merck & Company.[1]
Contents
Structure
According to a recent paper authored by GTx, "Readers are cautioned to note that the name ostarine is often mistakenly linked to the chemical structure of [S-4], which is also known as andarine. The chemical structure of ostarine has not been publicly disclosed."[2] While GTx has not formally disclosed the structure of ostarine, the chemical composition of ostarine is revealed in patent databases such the WIPO[3] and discussed by Zhang et al., 2009 in the primary literature.[4] Various SARM chemotypes exist (aryl propionamides, quinolines, quinolinones, bicyclic hydantoins), though aryl propionamides such as ostarine, andarine/S-4, and S-23 represent some of the most advanced putative therapeutics under investigation.[5] In terms of atom connectivity, enobosarm differs from andarine by cyano substitutions on the phenyl rings as it replaces both the nitro and acetamido moieties.
Doping
Selective androgen receptor modulators may be used by athletes to assist in training and increase physical stamina and fitness, potentially producing effects similar to anabolic steroids. For this reason, SARMs were banned by the World Anti-Doping Agency in January 2008 despite no drugs from this class yet being in clinical use, and blood tests for all known SARMs have been developed.[6][7]
In June 2013, professional cyclist Nikita Novikov was provisionally suspended after a possible breach of anti-doping rules, due to a positive A-sample result for ostarine.[8]
UFC Fighter Tim Means was pulled from a fight in February 2016 after testing positive for Ostarine in a pre-fight drug screening administered by USADA.[9]
In June 2015 Azerbaijan's Chaltu Beji tested positive for doping at the 2015 European Games in Baku. The 18-year-old Ethiopian-born Beji tested positive for the banned substance ostarine in a urine sample with a B sample confirming the result. She won the 3,000 meter steeplechase event despite falling at the last water jump, she was disqualified because of the positive tests.[10]
In May 2016, Romanian-Canadian professional boxer Lucian Bute, former super middleweight world titleholder, tested positive for ostarine after his draw against Swedish professional boxer and titleholder Badou Jack on April 30 at the D.C. Armory in Washington, D.C.[11]
Litigation
On October 20, 2015, Nutrition Distribution LLC filed suit against IronMagLabs over their sales of supplements containing Enobosarm, alleging false advertising under the Lanham Act and unfair competition under the California Business and Professions Code.[12]
References
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- ↑ James T. Dalton, Duane D. Miller, Donghua Yin, Yali He. Selective androgen receptor modulators and methods of use thereof. US Patent 6569896
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ WO application 2008127717, James T. Dalton and Duane D. Miller, "Selective Androgen Receptor Modulators for Treating Diabetes", published Oct 23, 2008, assigned to University of Tennessee Research Foundation, James T. Dalton, and Duane D. Miller
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Thevis M, Kohler M, Schlörer N, Kamber M, Kühn A, Linscheid MW, Schänzer W. Mass spectrometry of hydantoin-derived selective androgen receptor modulators. Journal of Mass Spectrometry. 2008 May;43(5):639-50. PMID 18095383
- ↑ Thevis M, Kohler M, Thomas A, Maurer J, Schlörer N, Kamber M, Schänzer W. Determination of benzimidazole- and bicyclic hydantoin-derived selective androgen receptor antagonists and agonists in human urine using LC-MS/MS. Analytical and Bioanalytical Chemistry. 2008 May;391(1):251-61. PMID 18270691
- ↑ http://www.vacansoleildcm.co.uk/nieuws/nikita-novikov-provisionally-suspended-after-possible-breach-of-anti-doping-rules.html
- ↑ http://mmajunkie.com/2016/02/tim-means-pulled-from-ufc-fight-night-83-headliner-after-failed-usada-test
- ↑ http://www.dpa-international.com/news/sports2/azerbaijans-beji-fails-doping-test-at-european-games-a-45758559.html
- ↑ http://espn.go.com/boxing/story/_/id/15751796/lucian-bute-tested-positive-draw-vs-badou-jack
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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