1)  C_(21) steroidal glycosides
C21甾苷
1.
The relative content of C_(21) steroidal glycosides and paste rate were used as endpoints.
首先确定最佳醇提浓度;其次采用L9 (34 )正交实验设计,以白首乌中C21甾苷相对含量和出膏率为评价指标,优化醇提工艺;最后优选各种辅料,确定含片处方。
2)  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。
3)  C21 steroidal glycoside of Cynanchum auriculatum
白首乌C21甾苷
4)  C2
C2
1.
Effect of C2 gene on humen gastric cancer cell cycle;
C2基因对人胃癌细胞周期的影响
2.
PREPARATION AND IDENTIFICATION OF THE FUNCTIONA LLY PURE C2 IN GUINEA PIG SERUM;
豚鼠血清功能纯C2分子的制备和鉴定
5)  C~2Σ state
C2∑
6)  C2 hydrocarbon
C2烃
1.
The experiments of glow discharge plasma conversion of methane to C2 hydrocarbons were conducted by a novel reactor with rotary electrode at room temperature and atmospheric pressure.
采用新型的旋转电极辉光放电反应器,在常温常压下对辉光等离子体作用下的甲烷转化制C2烃进行了研究。
2.
In this paper the kinetics of methane cracked and converted to C2 hydrocarbons in cold plasma was investigated.
本论文着重探讨冷等离子体裂解甲烷制C2烃反应的动力学过程。
参考词条
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。