<unk> , also known as 17α-ethynyl-18-methyl-19-nor-δ9,11-testosterone, as well as 17α-ethynyl-18-methylestra-4,9,11-trien-17β-ol-3-one or as 13β-ethyl-18,19-dinor-17α-pregna-4,9,11-trien-20-yn-17β-ol-3-one, is a synthetic estrane steroid and a derivative of testosterone. It is more specifically a derivative of norethisterone (17α-ethynyl-19-nortestosterone) and is a member of the gonane (18-methylestrane) subgroup of the 19-nortestosterone family of progestins.<unk>  is the C18 methyl derivative of norgestrienone (17α-ethynyl-19-nor-δ9,11-testosterone) and the δ9,11 analogue of levonorgestrel (17α-ethynyl-18-methyl-19-nortestosterone) and is also known as ethylnorgestrienone due to the fact that it is the C13β ethyl variant of norgestrienone. It is also the C17α ethynyl and C18 methyl derivative of the AAS trenbolone. The androgenic properties of<unk>  are more exploited in its derivative tetrahydrogestrinone (THG; 17α-ethyl-18-methyl-δ9,11-19-nortestosterone), a designer steroid which is far more potent as both an AAS and progestogen in comparison. THG was banned by the Food and Drug Administration (FDA) in 2003.
Gestrinone
Gestodene
Mestanolone
Goserelin
Anastrozole
Oxandrolone
Allenestrol
Hexestrol