<研究報告>パキスタン産エビガラシダ属 (Cheilanthes) 植物における内生フラボノイドの種間変異と C. dalhousiae のフラボノイド配糖体

概要

論文の詳細を見る
The five major flavonoid glycosides were isolated from the fronds of Pakistani Cheilanthes dalhousiae. Four of the flavonoids were identified as apigenin 5-O-glucoside, luteolin 5-O-glucoside, quercetin 3-O-glucoside and kaempferol 3-O-glucoside by direct PC comparisons with authentic specimens, UV spectra and qualitative analysis of hydrolysates. Remained one was tentatively characterized as apigenin 5,7-O-diglycoside. Of their glycosides, apigenin 5-O-glucoside and luteolin 5-O-glucoside, which were rare occurrence in nature, since the flavonoids having 4-carbonyl group such as flavones and flavonols were hardly glycosylated at 5-position for hydrogen bond between 5-hydroxyl and 4-carbonyl groups, have only been reported from Equisetum arvense in pteridophytes. Apigenin which was glycosylated both 5- and 7-hydroxyl groups was found for the first time in nature. The internal flavonoid profiles of Pakistani six Cheilanthes species, C. dalhousiae, C. acrostica, C. anceps, C. albomarginata, C. formosana and C. bicolor, were preliminarily investigated by two-dimensional paper chromatography and proved that they have the diagnostic flavonoid patterns, respectively.
国立科学博物館の論文