18,19-Dinorpregn-4-en-20-yn-3-one,13-ethyl-17-hydroxy-,(17α)-(-)-(-)-13-

Ethyl-17-hydroxy-18,19-dinoxr-17α-pregn-4-en-20-yn-3-one [797-63-7]

质量标准: 

美国药典25版 

鉴别：符合规定 

A: 红外吸收 

熔程：232℃~ 239℃ 

比旋度：-30°~ -35° 

干燥失重 ≤ 0.5 % 

灼烧残渣：≤0.3% 

乙炔化合物限度：7.81%~8.18% 

层析杂质： 

单个杂质≤0.5％ 

总杂质≤2.0％ 

含量: 98%~102%

Quality standard:

USP25

Identification:

A: Infrared Absorption

Melting range: 232℃~ 239℃

Specific rotation: between -30°and -35°

Loss on drying:≤0.5 %

Residue on ignition:≤0.3% 

Limit of ethynyl group: 7.81%~8.18%

Chromatographic purity:

Single impurity≤0.5%

Sum of impurities≤2.0% 

Assay: 98%~102%