|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||437.641 g/mol 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.
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