title: [Standardization of the birch leaf].
abstract: Dried leaves of Betula pendula Roth (14 batches) and B. pubescens Ehrh. (3 batches) present a similar flavonoid pattern. The mean levels of the principal flavonoid compounds were respectively: total flavonoids 3.29 and 2.77%, hyperoside 0.80 and 0.77%, avicularin (two forms) 0.57 and 0.26%, galactosyl-3 myricetol 0.37 and 0.18%, glucuronyl-3 quercetol 0.25 and 0.36%, quercitrin 0.14 and 0.12%. The flavonoid levels were higher in young leaves and lower in old leaves of B. pendula. 14 batches of commercial origin were also examined for a comparative study. Pharmacopoeial specifications are proposed for a revision of the monograph "Betulae folium".
authors.affiliation: Laboratoire de Pharmacognosie et Phytothérapie, Faculté de Pharmacie, Clermont-Ferrand.
authors.forename: A
authors.initials: A
authors.lastname: Carnat
authors.forename: I
authors.initials: I
authors.lastname: Lacouture
authors.forename: D
authors.initials: D
authors.lastname: Fraisse
authors.forename: J L
authors.initials: JL
authors.lastname: Lamaison
mesh_terms: D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry*; D012015:Reference Standards; D014197:Trees
chemical_list: D005419:Flavonoids
vernacular_title: Standardisation de la feuille de bouleau.