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C#CC1(O)CCC2C3CCC4=C(CCC(=O)C4)C3CCC21CC -
(17a)-13-ethyl-17-hydroxy-18,19-Dinorpregn-5(10)-en-20-yn-3-one; 18,19-Dinor-17a-pregn-5(10)-en-20-yn-3-one, 13-ethyl-17-hydroxy- (7CI,8CI); 13-Ethyl-17a-ethynyl-17-hydroxygon-5(10)-en-3-one; Levonorgestrel Imp. B (EP) CAS 19914-67-1 PubChem CID 29979902
C#C[C@]1(O)CC[C@H]2[C@@H]3CCC4=C(CCC(=O)C4)[C@H]3CC[C@@]21CC -
C#C[C@]1(O)CCC2[C@@H]3CCC4=C(CCC(=O)C4)C3CC[C@@]21CC -
13-Ethyl-17-hydroxy-18,19-dinor-17?-pregn-5(10)-en-20-yn-3-one; (1S,10R,11S,14R,15S)-15-Ethyl-14-ethynyl-14-hydroxytetracyclo[8.7.0.02,7.011,15]heptadec-2(7)-en-5-one CAS 19914-67-1 PubChem CID 145714480
C#C[C@@]1(O)CC[C@H]2[C@@H]3CCC4=C(CCC(=O)C4)[C@H]3CC[C@]21CC -
C#C[C@@]1(O)CC[C@@H]2[C@H]3CCC4=C(CCC(=O)C4)[C@H]3CC[C@@]21CC