52-79-9

STS 737 NSC 85401 5a-Dihydronorethindrone 5α-Dihydronorethindrone 4,5α-Dihydronorethisterone 4,5Alpha-Dihydronorethisterone Norethindrone 4,5-Dihydro Impurity 17α-Ethynyl-5α-estran-17β-ol-3-one Norethindrone 4,5a-Dihydro Impurity Norethindrone 4,5?±-Dihydro Impurity 4,5α-Dihydronorethisterone, CAS 52-79-9 17β-Hydroxy-17α-ethynyl-5α-estran-3-one 17β-Hydroxy-19-nor-5α,17α-pregn-20-yn-3-one 19-Norpregn-20-yn-3-one, 17-hydroxy-, (5α,17α)- 17alpha-Aethinyl-19-norandrostan-17beta-ol-3-on (5S,8R,9R,10S,13S,14S,17R)-17-ethynyl-17-hydroxy-13-methyl-1,2,4,5,6,7,8,9,10,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-3-one