a synthetic estrane steroid and a derivative of nandrolone (19-nortestosterone). It is specifically nandrolone with two additional double bonds in the steroid nucleus. Trenbolone esters, which have an ester at the C17β position, include trenbolone acetate, trenbolone enanthate, trenbolone hexahydrobenzylcarbonate, and trenbolone undecanoate. History Trenbolone was first synthesized in 1963. Society and culture Generic names Trenbolone is the generic name of the drug and its and . It has also been referred to as trienolone or trienbolone or tren. Legal status Some bodybuilders and athletes use trenbolone hexahydrobenzylcarbonate and other esters (acetate, enanthate) for their muscle-building and otherwise performance-enhancing effects. Such use is illegal in the United States and several European and Asian countries. The DEA classifies trenbolone and its esters as Schedule III controlled substances under the Controlled Substances Act. Trenbolone is classified as a Schedule 4 drug in Canada and a class C drug with no penalty for personal use or possession in the United Kingdom. Use or possession of steroids without a prescription is a crime in Australia. Doping in sports There are known cases of doping in sports with trenbolone esters by professional athletes. See also Metribolone References Further reading Androgens and anabolic steroids Estranes Ketones Progestogens Secondary alcohols World Anti-Doping Agency prohibited substances