The concentrations of erythromycin propionate and erythromycin base in the plasma were determined by HPLC-MS.
采用HPLC MS法测定给药后不同时间丙酸红霉素和红霉素碱的血药浓度。
Methods The target compound(1)was prepared from erythromycin A(3)and hydroxylamine hydrochloride in a novel acid base buffer.
方法在酸碱缓冲溶液中由红霉素A（3 ）与盐酸羟胺缩合生成1。
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