etonogestrel and its Impurities
Etonogestrel is used as contraception to prevent pregnancy. It is marketed throughout the world. It is a progestin. Reference standards of Etonogestrel API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(8S,9S,10R,13S,14S,17S)-13-Ethyl-11-methylene-1,2,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17-ol
(8S,9S,10R,13S,14S,17S)-13-Ethyl-11-methylene-1,2,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17-ol
Catalogue No.:PA 32 31510
CAS :
1574323-08-2
Molecular Formula : C22H32O3
Molecular Weight : 344.5


(8S,9S,10R,13S,14S)-13-Ethyl-11-methylene-1,4,7,8,9,10,11,12,13,14,15,16-dodecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17(2H)-one
(8S,9S,10R,13S,14S)-13-Ethyl-11-methylene-1,4,7,8,9,10,11,12,13,14,15,16-dodecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17(2H)-one
Catalogue No.:PA 32 31520
CAS :
NA
Molecular Formula : C22H30O3
Molecular Weight : 342.48


(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-11-methylene-1,2,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17-ol
(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-11-methylene-1,2,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17-ol
Catalogue No.:PA 32 31540
CAS :
NA
Molecular Formula : C24H32O3
Molecular Weight : 368.52


(8S,9S,10R,13S,14S)-13-Ethyl-3-ethynyl-3-hydroxy-11-methylene-1,2,3,6,7,8,9,10,11,12,13,14,15,16-tetradecahydro-17H-cyclopenta[a]phenanthren-17-one
(8S,9S,10R,13S,14S)-13-Ethyl-3-ethynyl-3-hydroxy-11-methylene-1,2,3,6,7,8,9,10,11,12,13,14,15,16-tetradecahydro-17H-cyclopenta[a]phenanthren-17-one
Catalogue No.:PA 32 31550
CAS :
NA
Molecular Formula : C22H28O2
Molecular Weight : 324.46


(8S,9S,10R,14S,17R)-13-Ethyl-3,17-diethynyl-11-methylene-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol
(8S,9S,10R,14S,17R)-13-Ethyl-3,17-diethynyl-11-methylene-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,17-diol
Catalogue No.:PA 32 31560
CAS :
NA
Molecular Formula : C24H30O2
Molecular Weight : 350.5


(8S,9S,10R,13S,14S,17S)-13-Ethyl-17-ethynyl-17-hydroxy-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
(8S,9S,10R,13S,14S,17S)-13-Ethyl-17-ethynyl-17-hydroxy-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PA 32 31570
CAS :
NA
Molecular Formula : C22H28O2
Molecular Weight : 324.46


(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-6,16,17-trihydroxy-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-6,16,17-trihydroxy-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PA 32 31590
CAS :
NA
Molecular Formula : C22H28O4
Molecular Weight : 356.46


(8S,9S,10R,11R,13S,14S,17R)-13-Ethyl-17-ethynyl-6,11,17-trihydroxy-11-methyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
(8S,9S,10R,11R,13S,14S,17R)-13-Ethyl-17-ethynyl-6,11,17-trihydroxy-11-methyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PA 32 31600
CAS :
NA
Molecular Formula : C22H30O4
Molecular Weight : 358.48


(13S)-13-Ethyl-6,7,8,9,10,12,13,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,11,17(2H)-trione
(13S)-13-Ethyl-6,7,8,9,10,12,13,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,11,17(2H)-trione
Catalogue No.:PAI 05 008070
CAS :
NA
Molecular Formula : C19H24O3
Molecular Weight : 300.40


(13S)-13-Ethyl-1,2,4,7,8,9,10,12,13,14,15,16-dodecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolane]-11,17-dione
(13S)-13-Ethyl-1,2,4,7,8,9,10,12,13,14,15,16-dodecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolane]-11,17-dione
Catalogue No.:PAI 05 008080
CAS :
NA
Molecular Formula : C21H28O4
Molecular Weight : 344.45


(13S)-13-Ethyl-17-hydroxy-1,4,7,8,9,10,12,13,14,15,16,17-dodecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-11(2H)-one
(13S)-13-Ethyl-17-hydroxy-1,4,7,8,9,10,12,13,14,15,16,17-dodecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-11(2H)-one
Catalogue No.:PAI 05 008090
CAS :
NA
Molecular Formula : C21H30O4
Molecular Weight : 346.47


(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-6,16,17-trihydroxy-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-6,16,17-trihydroxy-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PA 32 0311000
CAS :
NA
Molecular Formula : C22H28O4
Molecular Weight : 356.46


(8S,9S,10R,11R,13S,14S,17R)-13-Ethyl-17-ethynyl-6,11,17-trihydroxy-11-methyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
(8S,9S,10R,11R,13S,14S,17R)-13-Ethyl-17-ethynyl-6,11,17-trihydroxy-11-methyl-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PA 32 0311001
CAS :
NA
Molecular Formula : C22H30O4
Molecular Weight : 358.48


(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-3-methoxy-11-methylene-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol
(8S,9S,10R,13S,14S,17R)-13-Ethyl-17-ethynyl-3-methoxy-11-methylene-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol
Catalogue No.:PA 32 0311002
CAS :
NA
Molecular Formula : C23H30O2
Molecular Weight : 338.49


(4aR,4bS,5S,8aS,9R,11aS,11bR)-9-Ethynyl-9-hydroxy-4,4a,4b,5,6,7,8,9,10,11,11a,11b,12,13-tetradecahydro-5,8a-methanocyclopenta[3,4]cycloocta[1,2-a]naphthalen-2(3H)-one
(4aR,4bS,5S,8aS,9R,11aS,11bR)-9-Ethynyl-9-hydroxy-4,4a,4b,5,6,7,8,9,10,11,11a,11b,12,13-tetradecahydro-5,8a-methanocyclopenta[3,4]cycloocta[1,2-a]naphthalen-2(3H)-one
Catalogue No.:PA 32 0311006
CAS :
201539-48-2
Molecular Formula : C22H28O2
Molecular Weight : 324.46


(17α)-13-Ethyl-17-hydroxy-11-methylene-21-(trimethylsilyl)-18,19-dinorpregn-4-en-20-yn-3-one
(17α)-13-Ethyl-17-hydroxy-11-methylene-21-(trimethylsilyl)-18,19-dinorpregn-4-en-20-yn-3-one
Catalogue No.:PA 32 0311008
CAS :
2130730-96-8
Molecular Formula : C25H36O2Si
Molecular Weight : 396.65


(8S,9S,10R,13S,14S,17R)-3-Ethoxy-13-ethyl-17-ethynyl-11-methylene-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol
(8S,9S,10R,13S,14S,17R)-3-Ethoxy-13-ethyl-17-ethynyl-11-methylene-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol
Catalogue No.:PA 32 0311010
CAS :
NA
Molecular Formula : C24H32O2
Molecular Weight : 352.52


(8S,9S,10R,13S,14S,17S)-3-Ethoxy-13-ethyl-11-methylene-17-((trimethylsilyl)ethynyl)-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol
(8S,9S,10R,13S,14S,17S)-3-Ethoxy-13-ethyl-11-methylene-17-((trimethylsilyl)ethynyl)-2,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-ol
Catalogue No.:PA 32 0311012
CAS :
NA
Molecular Formula : C27H40O2Si
Molecular Weight : 424.7


(8S,9S,10R,13S,14S,17S)-17-Ethynyl-17-hydroxy-13-methyl-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
(8S,9S,10R,13S,14S,17S)-17-Ethynyl-17-hydroxy-13-methyl-11-methylene-1,2,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-3H-cyclopenta[a]phenanthren-3-one
Catalogue No.:PA 32 0311013
CAS :
NA
Molecular Formula : C21H26O2
Molecular Weight : 310.44


(8S,9S,10R,13S,14S)-13-ethyl-11-methylene-1,4,7,8,9,10,11,12,13,14,15,16-dodecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17(2H)-one
(8S,9S,10R,13S,14S)-13-ethyl-11-methylene-1,4,7,8,9,10,11,12,13,14,15,16-dodecahydrospiro[cyclopenta[a]phenanthrene-3,2'-[1,3]dioxolan]-17(2H)-one
Catalogue No.:PA 32 0311014
CAS :
149438-01-7
Molecular Formula : C22H30O3
Molecular Weight : 342.48