Abbreviation: Norethisterone,98%; 17-alpha-ethynyl-17-beta-hydroxyoestr-4-en-3-one; Norethisterone; 17-ethynyl-17-hydroxyestr-4-en-3-one; (17beta)-17-ethynyl-17-hydroxyestr-4-en-3-one; (8xi,9xi,14xi,17beta)-17-ethynyl-17-hydroxyestr-4-en-3-one 
Molecular weight: 298.4     C₂₀H₂₆O₂ 
CAS No.: 68-22-4    
Appearance: white or off-white crystalline powder, no odor, has a little bitter taste.  
Purity: 97.0%～102.0% (HPLC)
Packing: 20kg/fiber drum 
Product standard: CHP
Uses: Progestational hormone drug. It can be used in the treatment of irregular menstruation and endometriosis, etc.