<unk> , also known as 3-deketo-11-methylene-17α-ethynyl-18-methyl-19-nortestosterone or as 11-methylene-17α-ethynyl-18-methylestr-4-en-17β-ol, 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 (13β-ethylgonane or 18-methylestrane) subgroup of the 19-nortestosterone family of progestins.<unk>  is the C3 deketo analogue of etonogestrel and the C3 deketo and C11 methylene analogue of levonorgestrel. Synthesis A chemical synthesis of<unk>  has been published.
Desogestrel
Gestodene
Levonorgestrel
Etonogestrel
Norgestrel
Hexestrol
Chloroethynylnorgestrel
Fosfestrol