17-alpha-Ethinyl-13-beta-ethyl-17-beta-hydroxy-4-estren-3-one
(-)-13-Ethyl-17-hydroxy-18,19-dinor-17alpha-pregn-4-en-20-yn-3-one
Levonova
17alpha-Ethynyl-13beta-ethyl-3-oxo-4-estren-17beta-ol
13-beta-Ethyl-17alpha-ethynyl-17beta-hydroxygon-4-en-3-one
Levonelle
Postinor
C21H28O2
Levonorgestrel
levonorgestrel
Plan B
Microluton
Microval
13-Ethyl-17-alpha-ethynyl-17-beta-hydroxy-4-gonen-3-one
Jadelle
17-alpha-Ethynyl-13-ethyl-19-nortestosterone
17-Ethynyl-18-methyl-19-nortestosterone
d(-)-Norgestrel
Microlut
17alpha-ethynyl-17beta-hydroxy-18a-homoestr-4-en-3-one
(1S,2R,10R,11S,14R,15S)-15-ethyl-14-ethynyl-14-hydroxytetracyclo[8.7.0.0^{2,7}.0^{11,15}]heptadec-6-en-5-one
18-Methylnorethisterone
17alpha-Ethynyl-18-homo-19-nortestosterone
Mirena
NorLevo
13-Ethyl-17-alpha-ethynylgon-4-en-17-beta-ol-3-one
17alpha-Ethynyl-17-hydroxy-18-methylestr-4-en-3-one
levonorgestrelum
18-Methyl-17-alpha-ethynyl-19-nortestosterone
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