epimere

epimere

1. 1H-NMR characteristic spectra of Epimer UDCA CDCA and deterimination the Major composition in bear bile powder has been reported.

利用其特征谱峰鉴别熊胆粉中的熊去氧胆酸和鹅去氧胆酸并测定其相对含量。

2. Keywords Two-dimensional NMR;Chemical shift;Methyl gibbercllate;Epimer;Configuration .;

化学位移;赤霉酸甲酯;差向异构体;构型;

3. Keywords Luminescent bacterium;Tetracycline;Epimer;Veterinary medicine;

发光菌;四环素;差向异构体;兽药;

4. Keywords Soyasterol;epimer;high performance liquid chromatography;gas chromatography-mass spectrometry;

大豆甾醇;差向异构体;高效液相色谱;气相色谱-质谱;

5. Isolation and identification of two new epimer from the mother liquid of megestrol acetate

安宫黄体酮母液中两个新化合物的分离与结构鉴定

6. ~1H-NMR characteristic spectra of Epimer UDCA CDCA and deterimination the Major composition in bear bile powder has been reported.

本文研究了差向异构体熊去氧胆酸和鹅去氧胆酸的~1H-NMR谱学特征。 利用其特征谱峰鉴别熊胆粉中的熊去氧胆酸和鹅去氧胆酸并测定其相对含量。

7. 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

8. 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。

9. Keywords Curcumol;Microbial-transformation;Metabolite;Epimer;Aspergillus niger;Penicillium janthinellum;and Cunninghamella blakesleana;

莪术醇;微生物转化;代谢产物;差向异构体;黑曲霉;微紫青霉;短刺小克银汉霉;

10. 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。