epimer

The isolation and identification of two new epimer from the mother liquid of testosterone

睾丸素母液中两个新差向异构体的分离与结构鉴定

Paper chromatography of epimer of tetracycline

四环素中差向异构体的纸上层析

A Study on ~ 1H-NMR Characteristic Spectra of Epimer UDCA , CDCA and Determination of Bear Bile Powder

差向异构体熊去氧胆酸和鹅去氧胆酸的~1H&NMR谱学特征研究及熊胆粉主要成分测定

Analysis of epimer of anorethindrane dipropionate The isolation and identification of two new epimer from the mother liquid of testosterone

双炔失碳酯差向异构体的分析睾丸素母液中两个新差向异构体的分离与结构鉴定

Preparation of Protopanaxadiol and Its Epimer 20 ( R ) - Protopanaxadiol from Leaf Saponins of Panax Notoginseng

三七叶甙制备原人参二醇及其差向异构体

Dihydroartemisinin has a process of anomeric conversion from β - epimer to α - epimer in organic solvent .

双氢青蒿素在有机溶媒中存在α与β差向异构体的转化过程。

It elaborates the definitions of epimer and epimerization , states the applications of epimerization in medicine and pesticide , and points out its expansive prospect .

阐述了差向异构体和差向异构化的定义。差向异构化技术在医药和农药中间体中应用广泛，前景广阔。

RESULTS The chlortetracycline 's epimer , tetracycline and its epimer , as impurities in chlortetracycline have been determined by the liquid chromatogram and its first order mass spectrum .

结果得到金霉素样品液相色谱图以及液相色谱峰对应的一级质谱图。对谱图进行分析归纳，推测金霉素样品中含有四环素、差向异构四环素和差向异构金霉素杂质组分。