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1)  C21steroidal glycosides
C21甾体糖苷
1.
Objective:To establish a quantitative method to deter mine C21steroidal glycosides inMarsdenia tenacissima.
目的:建立通光藤中C21甾体糖苷成分的含量测定方法,为通光藤药材的质量控制提供依据。
2)  C21 steroid glycosides
C21甾体苷
3)  C_(21) Steroidal-Glycosides
C21甾体酯苷
1.
Objective To extract C_(21) Steroidal-Glycosides from the Herborize roots of Cynanchum auriculatum from the area of Three Gorges as much as possible.
方法采用微波萃取技术对隔山牛皮消的活性成分C21甾体酯苷进行提取,通过4因素3水平的正交试验,用分光光度法测定三峡隔山牛皮消中的C21甾体酯苷含量。
4)  C21 steroidal saponins
C21甾体皂苷
1.
Objective: To investigate the inhibition of three C21 steroidal saponins from Cynanchum auriculatum on the cell growth and cell cycle of human lung cancer A549 cells.
目的:探讨白首乌的3个C21甾体皂苷类成分对人肺癌A549细胞生长的抑制作用及对细胞周期的影响。
5)  C 21 steroidal glycoside
C21甾体配糖体
6)  C21 steroidal aglycone
C21甾苷元
1.
Using C21 steroidal aglycones(Caudatin steroidal aglycones and Kaider steroidal aglycones) extracted from Sanxia Cynanchum auriculatum as substrate,C11α-hydroxylated Cynanchum auriculatum C21 steroidal aglycones were prepared by Rhizopus nigricans and Aspergillus ochraceus.
以自三峡白首乌提取分离得到的C21甾苷元告达庭甾苷元和开德甾苷元作为底物,采用黑根霉(Rhizopus nigricans)和赭曲霉(Aspergillus ochraceus。
补充资料:21-羟基孕甾-4-烯-3,20-二酮-21-醋酸酯
分子式:C23H32O4
分子量:372.51
CAS号:56-47-3

性质:结晶(丙酮)或针状结晶(乙醇),空气中稳定。熔点154-160℃(159-161℃),高真空时升华。[α]10/D-177°(乙醇)/[α]20/D+168-176°(二噁烷)。微溶于乙醇、甲醇、丙酮、乙醚、二噁烷、植物油,不溶于水。

制备方法:暂无

用途:羟孕酮琥酯钠的中间体。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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