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1)  C-steroidal glycosides
C21甾
1.
Results: The major chemical constituents isolated from the plants of this genus were cardiac glycosides and C-steroidal glycosides,which had the activities of cardiac and antitumor.
结果:近几年研究表明,杠柳属植物的主要化学成分为强心苷类和C21甾类化合物,其中某些成分具有显著的强心、抗癌等药理活性。
2)  C 21 steroidal aglycones
C21甾甙元
3)  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。
4)  C21 steroid glycosides
C21甾体苷
5)  C21 steroidal glycosides
C21甾苷
1.
Results:The Temperature,the particle size of material and the 95% ethanol dosage were the main factors affecting the extraction of C21 steroidal glycosides,while the extraction duration presented the smallest effect.
目的:对白首乌中C21甾苷超临界CO2流体萃取工艺参数进行优化。
2.
Objective To study content of C21 steroidal glycosides in supercritical carbon dioxide with different solvents.
目的探讨含不同夹带剂的超临界CO2对C21甾苷提取的影响。
6)  C21 steroid
C21甾体
1.
The chemical constituents isolated from this genus include C21 steroids,triterpenes and cyclitols.
萝藦科牛奶菜属植物全世界约100种,中国产22种5变种,化学成分主要包括C21甾体类、三萜类和环醇类等。
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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