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
图以及
峰对应的一级质
图。对
图进行分析归纳,推测金霉
样品中含有四
、
向异构四
和
向异构金霉
杂质组分。