Chemical Constituents from Alnus formosana Burk. II. Polar Constituents from the Leaves

Abstract

This study was aimed to explore the n-BuOH soluble constituents of the leaves of Alnus formosana Burk. A total of 13 compounds were isolated and characterized. Of these, 2'''-cinnamoyloregonin is a new diaryl heptanoid glycoside. Ten of the remaining twelve known compounds, i.e. platyphylloside, aceroside VII, myzodendrone, quercetin, kaempferol-3-Orhamnoside, quercetin-3-O-rhamnoside, quercetin-3-O-glucoside, rhamnetin-3-O-rhamnoside, inositol, and shikimic acid, are reported for the first time for an Alnus species. The structures were characterized by spectral analysis.