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  2. Levonorgestrel
  3. Impurities

Levonorgestrel Impurities

Name Structure CASRN Other Names and Identifiers
Levonorgestrel-ABC-triene structure
13-Ethyl-17-hydroxy-18,19-dinor-17α-pregna-5,7,9-trien-20-yn-3-one structure
  • BP Levonorgestrel Impurity W
8(14)-Dehydrolevonorgestrel structure 1260525-53-8
  • BP Levonorgestrel Impurity A
  • δ8(14)-levonorgestrel
  • 13-ethyl-17-hydroxy-18,19-dinor-17α-pregna-4,8(14)-dien-20-yn-3-one
Δ5(10)-8β-Levonorgestrel structure 19914-67-1
  • BP Levonorgestrel Impurity B
  • 13-ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one
13-Ethyl-3-ethynyl-18,19-dinor-17α-pregna-3,5-dien-20-yn-17-ol structure
  • BP Levonorgestrel Impurity C
3-Deoxolevonorgestrel structure 32419-58-2
  • BP Levonorgestrel Impurity D
  • 13-ethyl-18,19-dinor-17α-pregn-4-en-20-yn-17-ol
  • 17α-ethinyl-13-ethyl-4-gonene-17-ol
6α-Hydroxylevonorgestrel structure 87585-03-3
  • BP Levonorgestrel Impurity G
  • 13-ethyl-6α,17-dihydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one
6β-hydroxylevonorgestrel structure 55555-97-0
  • BP Levonorgestrel Impurity H
  • 13-ethyl-6β,17-dihydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one
10β-Hydroxylevonorgestrel structure 21508-50-9
  • BP Levonorgestrel Impurity I
  • 13-ethyl-10,17-dihydroxy-18,19-dinor-17α-pregn-4-en-20-yn-3-one
6-Oxolevonorgestrel structure 1175109-63-3
  • BP Levonorgestrel Impurity J
  • 13-ethyl-17-hydroxy-18,19-dinor-17α-pregn-4-en-20-yne-3,6-dione
18-Methylnandrolone structure 793-55-5
  • BP Levonorgestrel Impurity K
  • 13-ethyl-17β-hydroxygon-4-en-3-one
13-Ethylgon-4-ene-3,17-dione structure 21800-83-9
  • BP Levonorgestrel Impurity L
Δ6-Levonorgestrel structure 51087-61-7
  • BP Levonorgestrel Impurity M
  • 13-ethyl-17-hydroxy-18,19-dinor-17%alpha;-pregna-4,6-dien-20-yn-3-one
13-Ethylgon-5(10)-ene-3,17-dione structure 4222-96-2
  • BP Levonorgestrel Impurity N
  • Δ5(10)-levodione
4,5-Dihydro-5α-methoxylevonorgestrel structure
  • BP Levonorgestrel Impurity O
  • 13-ethyl-17-hydroxy-5α-methoxy-18,19-dinor-17α-pregn-20-yn-3-one
Δ5-Levonorgestrel structure 100021-05-4
  • BP Levonorgestrel Impurity P
  • 17α-ethinyl-13-ethyl-4-gonene-17-ol
  • 13-ethyl-18,19-dinor-17α-pregn-4-en-20-yn-17-ol
13-Ethyl-3-methoxygona-2,5(10)-dien-17β-ol structure 1038-28-4
  • BP Levonorgestrel Impurity Q
Methoxydienone structure 2322-77-2
  • BP Levonorgestrel Impurity R
  • 13-Ethyl-3-methoxygona-2,5(10)-dien-17-one
  • Methoxygonadiene
13-Ethyl-3-methoxy-18,19-dinor-17α-pregna-3,5-dien-20-yn-17-ol structure 176254-10-7
  • BP Levonorgestrel Impurity S
13-Ethyl-3-methoxy-18,19-dinor-17α-pregna-2,5(10)-dien-20-yn-17-ol structure 14507-51-8
  • BP Levonorgestrel Impurity T
Norethisterone structure 68-22-4
  • BP Levonorgestrel Impurity U
  • Norethindrone
  • 17-hydroxy-19-nor-17α-pregn-4-en-20-yn-3-one
Dimeric Levonorgestrel structure
13-Ethyl-3-methoxy-18,19-dinor-17α-pregna-1,3,5(10)-trien-20-yn-17-ol structure 14009-70-2
  • BP Levonorgestrel Impurity V
4β,5β-Epoxy-norgestrel structure NA
13-Ethyl-3,4-diethynyl-18,19-dinor-17α-pregn-5-en-20-yn-3β,4α,17-triol structure
13-Ethyl-3,4-diethynyl-18,19-dinor-17α-pregn-5-en-20-yn-3α,4α,17-triol structure
13β-Ethyl-17α-ethinyl-17β-hydroxy-5α-gonan-3-one structure 78088-19-4
LNG Impurity 6 structure 100021-07-6
LNG Impurity 7 structure 10021-08-7