|Other names||Trenbolone undecylate; Estra-4,9,11-trien-17β-ol-3-one 17β-undecylate|
|Drug class||Androgen; Anabolic steroid; Androgen ester; Progestogen|
|Chemical and physical data|
|Molar mass||437.644 g·mol−1|
|3D model (JSmol)|
Trenbolone undecanoate, or trenbolone undecylate, is a synthetic and injected anabolic–androgenic steroid (AAS) and a derivative of nandrolone (19-nortestosterone) which was never marketed. It is the C17β undecanoate (undecylate) ester and a long-acting prodrug of trenbolone. The drug was described by Roussel Uclaf in 1967 and was the first long-lasting ester of trenbolone to be developed. Subsequently, trenbolone hexahydrobenzylcarbonate, a roughly equivalent compound, was developed and introduced for use in humans in 1980, though it was discontinued in 1997. Trenbolone enanthate is another long-lasting ester of trenbolone. Similarly to trenbolone undecanoate, it was never marketed, but it has been sold on the black market as a designer steroid for bodybuilders and athletes.
- Mathieu, J (1967). Proceedings of the International Symposium on Drug Research, Montreal, Canada, June 12-14, 1967. Chemical Institute of Canada, Medical Chemistry Group, Montreal, Canada. p. 134.
- William Llewellyn (2011). Anabolics. Molecular Nutrition Llc. p. 619. ISBN 978-0-9828280-1-4.
- Yarrow JF, McCoy SC, Borst SE (2010). "Tissue selectivity and potential clinical applications of trenbolone (17beta-hydroxyestra-4,9,11-trien-3-one): A potent anabolic steroid with reduced androgenic and estrogenic activity". Steroids. 75 (6): 377–89. doi:10.1016/j.steroids.2010.01.019. PMID 20138077. S2CID 205253265.
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