title: A pharmacognostic and chemical study of ma huang (Ephedra vulgaris var. helvetica). 1925.
authors.forename: K K
authors.initials: KK
authors.lastname: Chen
mesh_terms: D000697:Central Nervous System Stimulants / Q000302:isolation & purification / Q000494:pharmacology; D002681:China; D029790:Ephedra sinica / Q000033:anatomy & histology / Q000737:chemistry; D004809:Ephedrine / Q000302:isolation & purification / Q000494:pharmacology; D049673:History, 20th Century; D049690:History, Ancient; D006801:Humans; D008517:Phytotherapy / Q000266:history*; D018547:Plant Stems / Q000033:anatomy & histology
chemical_list: D000697:Central Nervous System Stimulants; D004809:Ephedrine