| 异名/同义词 | (17.ALPHA.)-(+/-)-13-ETHYL-17-HYDROXY-18,19-DINORPREGNA-4,8(14)-DIEN-20-YN-3-ONE 18,19-DINORPREGNA-4,8(14)-DIEN-20-YN-3-ONE, 13-ETHYL-17-HYDROXY-, (17.ALPHA.)-(+/-)- 8(14)-DEHYDRO NORGESTREL NORGESTREL IMPURITY A [EP IMPURITY] RAC-13-ETHYL-17-HYDROXY-18,19-DINOR-17.ALPHA.-PREGNA-4,8(14)-DIEN-20-YN-3-ONE
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