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
素样品
谱图以及谱峰对应的一级质谱图。对谱图进行分析归纳,推测素样品中含有四环素、差向异
四环素和差向异素杂质组分。
