Ethyltestosterone
Synthetic anabolic steroid
From Wikipedia, the free encyclopedia
Ethyltestosterone, or 17α-ethyltestosterone, also known as 17α-ethylandrost-4-en-17β-ol-3-one or 17α-pregn-4-en-17-ol-3-one, is a synthetic, orally active anabolic–androgenic steroid (AAS) of the 17α-alkylated group related to methyltestosterone which was never marketed.[1][2] Like methyltestosterone, ethyltestosterone is the parent compound of many AAS.[3] Derivatives of ethyltestosterone include norethandrolone (ethylnandrolone, ethylestrenolone), ethylestrenol (ethylnandrol), norboletone, ethyldienolone, tetrahydrogestrinone, bolenol (ethylnorandrostenol), and propetandrol.[3]
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| Other names | 17α-Ethyltestosterone; 17α-Ethylandrost-4-en-17β-ol-3-one; 17α-Pregn-4-en-17-ol-3-one |
| Routes of administration | By mouth |
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| Formula | C21H32O2 |
| Molar mass | 316.485 g·mol−1 |
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Ethyltestosterone is described as a very weak AAS[4][5] and is considerably weaker as an AAS than is methyltestosterone.[6] It is reported to have 1/10 of the anabolic potency and 1/20 of the androgenic potency of testosterone propionate in rodents.[7] Ethyltestosterone was also inactive in boys with dwarfism at 20 to 40 mg/day orally.[7] The low potency of ethyltestosterone is in notable contrast to norethandrolone (17α-ethyl-19-nortestosterone), the C19 nor analogue.[4] Analogues of ethyltestosterone with longer C17α chains such as propyltestosterone (topterone) have further reduced androgenic activity or even antiandrogenic activity.[2][8] In contrast to ethyltestosterone, its 19-demethyl variant, norethandrolone, is a potent AAS comparable in anabolic activity to testosterone propionate.[5]
