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.
结果得到金霉素样品液相色
图以及液相色
峰对应的一级质
图。对
图进行
析归纳,推测金霉素样品中含有四环素、差向异构四环素和差向异构金霉素杂质组
。
]质

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