- Cyclohexylmethyl [(8S,13S,14S,17S)-13-methyl-3-oxo-2,6,7,8,14,15,16,17-octahydro-1H-cyclopenta[a]phenanthren-17-yl] carbonate
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Trenbolone hexahydrobenzylcarbonate (brand name Parabolan, Hexabolan), or trenbolone cyclohexylmethylcarbonate, also known as estra-4,9,11-trien-17β-ol-3-one 17β-cyclohexylmethylcarbonate, is a synthetic anabolic-androgenic steroid (AAS) of the 19-nortestosterone group and an androgen ester – specifically, the 17β-hexahydrobenzylcarbonate ester of trenbolone – which was marketed in France for human clinical use but has since been discontinued. It was introduced in France in 1980 and voluntarily discontinued by its manufacturer in 1997. It acts as a long-acting prodrug of trenbolone when administered via intramuscular injection.