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Other names | THG; The Clear; 17α-Ethyl-18-methyl-δ9,11-19-nortestosterone; 17α-Ethyl-18-methylestra-4,9,11-trien-17β-ol-3-one |
Routes of administration | By mouth, intramuscular injection |
Drug class | Androgen; Anabolic steroid; Progestogen |
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Formula | C21H28O2 |
Molar mass | 312.453 g·mol−1 |
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Tetrahydrogestrinone (THG), known by the nickname The Clear, is a synthetic and orally active anabolic–androgenic steroid (AAS) which was never marketed for medical use.[1][2] It was developed by Patrick Arnold and was used by a number of high-profile athletes such as Barry Bonds and Dwain Chambers.