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19-Norandrosterone, also known as 5α-estran-3α-ol-17-one, is a metabolite of nandrolone (19-nortestosterone) and bolandione (19-norandrostenedione) that is formed by 5α-reductase. It is on the list of substances prohibited by the World Anti-Doping Agency since it is a detectable metabolite of nandrolone, an anabolic-androgenic steroid (AAS ...
A possible cause of incorrect urine test results is the presence of metabolites from other anabolic steroids, though modern urinalysis can usually determine the exact anabolic steroid used by analyzing the ratio of the two remaining nandrolone metabolites.
19-Nor-5-androstenedione, also known as estr-5-ene-3,17-dione, is a synthetic, orally active anabolic-androgenic steroid (AAS) and a derivative of 19-nortestosterone (nandrolone) that was never introduced for medical use.
19-Nor-5-androstenediol, also known as estr-5-ene-3β,17β-diol, is a synthetic, orally active anabolic-androgenic steroid (AAS) and a derivative of 19-nortestosterone (nandrolone) that was never introduced for medical use. [1] [2] [3] It is an androgen prohormone of nandrolone and of other 19-norandrostanes. [1] [2] [3]
Upon intramuscular injection in oil, which results in the formation of a long-lasting depot in the muscle, nandrolone decanoate is stored unchanged and is slowly absorbed into the body. [4] Once in the circulation , it is converted into nandrolone , which is the active form of the drug. [ 2 ]
The structure of trenbolone acetate is a 19-nor classification, which represents a structural change of the testosterone hormone. Trenbolone acetate lacks a carbon atom at the 19 position and carries a double bond at carbons 9 and 11. The position of these carbons slows its metabolism, which greatly increases its binding affinity to the AR, and ...
19-Nordehydroepiandrosterone (19-nor-DHEA), or 19-nor-5-dehydroepiandrosterone (19-nor-5-DHEA), is an estrane (19-norandrostane) steroid which was never marketed. [ 1 ] [ 2 ] It is the combined derivative of the androgen / anabolic steroid nandrolone (19-nortestosterone) and the androgen prohormone dehydroepiandrosterone (DHEA, or more ...
Scientific studies have shown that oral administration of bolandione is "a very ineffective strategy for stimulating skeletal muscle mass increases but may be associated with side effects".