Studies of Seasonal Variation of Alkaloids Contained in Ephedra sinica Herba in Inner Mongolia
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Abstract
The seasonal variation of 5 active alkaloids, namely: Ephedrine E, Pseudoephedrine PE, Norephedrine NE, Norpseudoephedrine NPE and Methylephedrine ME contained in Ephedra sinica Herba were determined by HPLC. All of specimens were collected from 5 fixed o
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