[Standardization of the birch leaf].
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".
Carnat
A
A
Laboratoire de Pharmacognosie et Phytothérapie, Faculté de Pharmacie, Clermont-Ferrand.
Lacouture
I
I
Fraisse
D
D
Lamaison
J L
JL
D002851:Chromatography, High Pressure Liquid; D005419:Flavonoids / Q000032:analysis* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry*; D012015:Reference Standards; D014197:Trees
D005419:Flavonoids
Standardisation de la feuille de bouleau.