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.
结果得到金霉样品液相色谱图以及液相色谱峰一级质谱图。谱图进行分析归纳,推测金霉样品中含有四环、差向异构四环和差向异构金霉杂质组分。