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Publikováno v:
Journal of AOAC INTERNATIONAL. 80:303-315
Má Huáng is a traditional Chinese medicine derived from the aerial parts of several Ephedra species (Ephedraceae). These plants produce (–)-ephed- rine, (+)-pseudoephedrine, (–)-norephedrine, (+)- norpseudoephedrine, (–)-N-methylephedrine, an