Clinical data
Routes of
ATC code None
Synonyms M-Sten, Methyl-Sten, Ultradol; NSC-74234
PubChem (CID) 252380
ChemSpider 221137
Chemical and physical data
Formula C21H32O2
Molar mass 316.485 g/mol
3D model (Jmol) Interactive image

Methylstenbolone (nicknames M-Sten, Methyl-Sten, Ultradrol), also known as 2,17α-dimethyl-4,5α-dihydro-δ1-testosterone (2,17α-dimethyl-δ1-DHT) or as 2,17α-dimethyl-5α-androst-1-en-17β-ol-3-one, is an orally active anabolic-androgenic steroid (AAS) and 17α-methylated derivative of dihydrotestosterone (DHT) that has never been introduced for medical use.[1][2][3] It is a designer steroid and has been sold "over-the-counter" via the internet as a "dietary/nutritional supplement".[1][2][3] Methylstenbolone is the 17α-methylated derivative of stenbolone, which is similarly androgenic but only about half as anabolic, as well as the δ1-isomer of methasterone (2α,17α-dimethyl-DHT).

See also


  1. 1 2 Rahnema CD, Crosnoe LE, Kim ED (2015). "Designer steroids - over-the-counter supplements and their androgenic component: review of an increasing problem". Andrology. 3 (2): 150–5. doi:10.1111/andr.307. PMID 25684733.
  2. 1 2 Kimergård A, Walker C, Cowan D (2015). "Potent and untested drugs sold as "dietary supplements"". BMJ. 351: h4181. PMID 26245332.
  3. 1 2 Joseph JF, Parr MK (2015). "Synthetic androgens as designer supplements". Curr Neuropharmacol. 13 (1): 89–100. doi:10.2174/1570159X13666141210224756. PMC 4462045Freely accessible. PMID 26074745.

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