Clostebol propionate

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Clostebol propionate
Clostebol propionate.svg
Clostebol propionate molecule ball.png
Clinical data
Trade namesYonchlon
Routes of
Intramuscular injection
CAS Number
PubChem CID
CompTox Dashboard (EPA)
Chemical and physical data
Molar mass378.937 g/mol g·mol−1
3D model (JSmol)

Clostebol propionate (brand name Yonchlon), also known as 4-chlorotestosterone 17β-propionate or as 4-chloroandrost-4-en-17β-ol-3-one 17β-propionate, is a synthetic, injected anabolic-androgenic steroid (AAS) and a derivative of testosterone.[1][2] It is an androgen ester – specifically, the C17β propionate ester of clostebol (4-chlorotestosterone) – and acts as a prodrug of clostebol in the body.[1][additional citation(s) needed] Clostebol acetate is administered via intramuscular injection.[2]

See also[edit]


  1. ^ a b J. Elks (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 305–. ISBN 978-1-4757-2085-3.
  2. ^ a b I.K. Morton; Judith M. Hall (31 October 1999). Concise Dictionary of Pharmacological Agents: Properties and Synonyms. Springer Science & Business Media. pp. 80–. ISBN 978-0-7514-0499-9.