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
霉素样品液相
以及液相峰对应的一级
。对进行
析归纳,推测霉素样品中含有四环素、差向异构四环素和差向异构霉素杂
。
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