<unk> , also known as 3-deketo-17α-allyl-19-nortestosterone or as 17α-allylestr-4-en-17β-ol, is a synthetic estrane steroid and a derivative of testosterone. It is a member of the estrane subgroup of the 19-nortestosterone family of progestins, but unlike most other 19-nortestosterone progestins, is not a derivative of norethisterone (17α-ethynyl-19-nortestosterone). This is because it possesses an allyl group at the C17α position rather than the usual ethynyl group. As such, along with altrenogest (17α-allyl-19-nor-δ9,11-testosterone),<unk>  is a derivative of 17α-allyltestosterone rather than of 17α-ethynyltestosterone.<unk>  is also unique among most 19-nortestosterone progestins in that it lacks the ketone at the C3 position. It shares this property with lynestrenol (17α-ethynylestr-4-en-17β-ol), desogestrel (11-methylene-17α-ethynyl-18-methylestr-4-en-17β-ol), and the anabolic–androgenic steroid (AAS) ethylestrenol (17α-ethylestr-4-en-17β-ol).<unk>  is the C17α allyl and C3 deketo derivative of the AAS nandrolone (19-nortestosterone), as well as the C17α allyl and C3 deketo analogue of the AAS normethandrone (17α-methyl-19-nortestosterone) and norethandrolone (17α-methyl-19-nortestosterone). Synthesis Chemical syntheses of<unk>  have been published.
Allylestrenol
Lynestrenol
Ethylestrenol
Norethandrolone
Androstanolone
Androstanolone benzoate
Norethisterone
Cloxotestosterone acetate