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

阐述了异构体异构化定义。异构化技术在医药农药中间体中用广,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、异构四环素异构金霉素杂质组分。