(8S,9S,10S,13S,14S,17S)-17-Ethynyl-10-hydroxy-13-methyl-3-oxo-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl acetate ;

Norethindrone Acetate 3-Ethyl Ether ; 3-Ethoxy-17α-ethynylestr-3,5-dien-17β-ol acetate ; CAS # 50717-99-2 ;

3-Isopropoxy-17α-ethynylestr-3,5-dien-17β-ol acetate ;

17β-Hydroxy-17α-ethynylestr-4,6-dien-3-one acetate ; CAS # 106765-04-2 ;

6α,17-Dihydroxy-19-nor-17α-pregn-4-en-20-yn-3-one 17-acetate ; CAS # 6856-28-6 ;

17β-Hydroxy-19-norpregn-4-en-20-yn-3-one 17-Acetate ; CAS # 51-98-9 ;

Norethindrone ; 17β-Hydroxy-17α-ethynylestr-4-en-3-one ; CAS # 68-22-4 ;

Norethindrone Acetate 5,10-Dehydro Impurity ; Norethynodrel Acetate ; 17β-Acetyloxy-17α-ethynylestr-5(10)-en-3-one ; CAS # 19637-28-6 ;

Norethindrone Acetate 5,6-Dehydro Impurity ; 17β-Acetyloxy-17α-ethynylestr-5-en-3-one ; CAS # 1175129-26-6 ;

6β-Acetyl Norethindrone Acetate ; 6β-Acetyl-3-oxo-19-nor-17a-pregn-4-en-20-yn-17-yl acetate ;

17-Hydroxy-19-nor-17α-pregn-4-ene-3,20-dione acetate ; CAS # 66964-58-7 ;

Norethindrone Acetate 6-beta-Hydroxy Impurity ; 6β,17-Dihydroxy-19-nor-17α-pregn-4-en-20-yn-3-one 17-acetate ; CAS # 6856-27-5 ;

Norethindrone Acetate 6-Oxo Impurity ; 17-Hydroxy-19-nor-17α-pregn-4-en-6-oxo-20-yn-3-one 17-acetate ; CAS # 438244-27-0 ;