[Flavonoids--main constituents of the leaves of Holodiscus discolor (Pursh) Maxim].

The paper deals with the isolation and identification of constituents of the leaves of Holodiscus discolor (Pursh) Maxim. (Rosaceae). Three flavonoid glycosides of flavonol type were isolated from the methanolic extract: kaempferol-3-O-rhamnoside, quercetin-3-O-glucoside (isoquercitrin) and quercetin-3-O-rhamnoside (quercitrin).