Main flavonoids in needles of Larix decidu A

Abstract

Present work. Freeze-dried needles were extracted with acetone-water. Ether and butanol fractions were separated by repeated banding on paper. Nine major flavonoids were isolated (in solution) and identified by chromatographic and UV spectral data of both the original and alkaline and/or acid hydrolysis/degradation products as: the 3-glucosides of kaempferol, quercetin and isorhamnetin, the 3-rutinosides of quercetin, isorhamnetin and syringetin, kaempferol-3-(p-coumarylglucoside), and vitexin and its xyloside, 8(xylosylglucosyl)apigenin. Besides the syringetin glycoside, other myricetin derivatives such as myricetin-3-glucoside were present in lower concentration.