Trenbolone hexahydrobenzylcarbonate is a synthetic, intramuscular anabolic-androgenic steroid (AAS) of the nandrolone group and an androgen ester, specifically the C17 hexahydrobenzylcarbonate (cyclohexylmethylcarbonate) ester of trenbolone. Trenbolone was marketed in France for medical use in people, but has since been removed from the market.