Trenbolone enanthate

Trenbolone enanthate, known by the nickname Trenabol, is a synthetic and injected anabolic–androgenic steroid (AAS) and a derivative of nandrolone which was never marketed. It is the C17β enanthate ester and a long-acting prodrug of trenbolone. Trenbolone enanthate was never approved for medical or veterinary use but is used in scientific research and has been sold on the internet black market as a designer steroid for bodybuilders and athletes.

Structural properties of major anabolic steroid esters
Anabolic steroidStructureEsterRelative
mol. weight		Relative
AAS contentb		Durationc
PositionMoietyTypeLengtha
Boldenone undecylenateC17βUndecylenic acidStraight-chain fatty acid111.580.63Long
Drostanolone propionateC17βPropanoic acidStraight-chain fatty acid31.180.84Short
Metenolone acetateC17βEthanoic acidStraight-chain fatty acid21.140.88Short
Metenolone enanthateC17βHeptanoic acidStraight-chain fatty acid71.370.73Long
Nandrolone decanoateC17βDecanoic acidStraight-chain fatty acid101.560.64Long
Nandrolone phenylpropionateC17βPhenylpropanoic acidAromatic fatty acid– (~6–7)1.480.67Long
Trenbolone acetateC17βEthanoic acidStraight-chain fatty acid21.160.87Short
Trenbolone enanthatedC17βHeptanoic acidStraight-chain fatty acid71.410.71Long
Footnotes: a = Length of ester in carbon atoms for straight-chain fatty acids or approximate length of ester in carbon atoms for aromatic fatty acids. b = Relative androgen/anabolic steroid content by weight (i.e., relative androgenic/anabolic potency). c = Duration by intramuscular or subcutaneous injection in oil solution. d = Never marketed. Sources: See individual articles.
Trenbolone enanthate
Clinical data
Other namesTrenabol; Trenbolone heptanoate; 19-Nor-δ9,11-testosterone 17β-enanthate; Estra-4,9,11-trien-17β-ol-3-one 17β-enanthate
Routes of
administration		Intramuscular injection
Drug classAndrogen; Anabolic steroid; Androgen ester; Progestogen
Identifiers
  • [(8S,13S,14S,17S)-13-Methyl-3-oxo-2,6,7,8,14,15,16,17-octahydro-1H-cyclopenta[a]phenanthren-17-yl] heptanoate
CAS Number
PubChem CID
ChemSpider
UNII
Chemical and physical data
FormulaC25H34O3
Molar mass382.544 g·mol−1
3D model (JSmol)
  • CCCCCCC(=O)O[C@H]1CC[C@@H]2[C@@]1(C=CC3=C4CCC(=O)C=C4CC[C@@H]23)C
  • InChI=1S/C25H34O3/c1-3-4-5-6-7-24(27)28-23-13-12-22-21-10-8-17-16-18(26)9-11-19(17)20(21)14-15-25(22,23)2/h14-16,21-23H,3-13H2,1-2H3/t21-,22+,23+,25+/m1/s1
  • Key:HGSFRISGULOJBX-FVEXOFTDSA-N
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