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.
结果得到金霉图以及
峰对应的一级质
图。对
图进行分析归纳,推测金霉
中含有四环
、差向异构四环
和差向异构金霉
杂质组分。