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.
结果得到霉素样品液
图以及液
峰对应的一级质
图。对
图进行分析归纳,推测
霉素样品中含有四环素、差向
四环素和差向
霉素杂质组分。