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.
结果得到样品液相色谱图以及液相色谱峰对应
一级质谱图。对谱图进行分析归纳,推测
样品中含有四环
、差向异构四环
和差向异构
杂质组分。