Oxabolone

Oxabolone
Clinical data
Other names4-Hydroxy-19-nortestosterone; 4,17β-Dihydroxyestr-4-en-3-one; 19-Norandrost-4-ene-4,17β-diol-3-one
Routes of
administration		Intramuscular injection (as oxabolone cipionate)
Drug classAndrogen; Anabolic steroid
Identifiers
  • (8R,9S,10R,13S,14S,17S)-4,17-dihydroxy-13-methyl-2,6,7,8,9,10,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-one
CAS Number
ChemSpider
UNII
CompTox Dashboard (EPA)
ECHA InfoCard100.022.920
Chemical and physical data
FormulaC18H26O3
Molar mass290.403 g·mol−1
3D model (JSmol)
  • O=C4CC[C@H]3C(/CC[C@@H]1[C@@H]3CC[C@]2(C)[C@@H](O)CC[C@@H]12)=C4/O
  • InChI=1S/C18H26O3/c1-18-9-8-11-10-4-6-15(19)17(21)13(10)3-2-12(11)14(18)5-7-16(18)20/h10-12,14,16,20-21H,2-9H2,1H3/t10-,11-,12-,14+,16+,18+/m1/s1
  • Key:GXHBCWCMYVTJOW-YGRHGMIBSA-N

Oxabolone is a synthetic anabolic-androgenic steroid (AAS) of the nandrolone (19-nortestosterone) group which was never marketed. It can be formulated as the cipionate ester prodrug oxabolone cipionate, which, in contrast, has been marketed for medical use.

Oxabolone is on the World Anti-Doping Agency's list of prohibited substances, and is therefore banned from use in most major sports.

The 17α-methylated analogue of oxabolone is methylhydroxynandrolone (4-hydroxy-17α-methyl-19-nortestosterone) and the 17α- and 19-methylated derivative of oxabolone is oxymesterone (4-hydroxy-17α-methyltestosterone).

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