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Products:(17)-13-Ethyl-3-methoxy-18,19-dinorpregna-3,5-dien-20-yn-17-ol 
Synonyms:Levonorgestrel Impurity S 
Cas No.:176254-10-7 
Molecular Formula:C22H30O2 
Molecular Weight:326.47 
Assay:95%min 
Molecular Structure: 

 

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