シダ類の化学とケモタキソノミー (第65報) : 新フラボノイド配糖体について その2(有機化学)

Abstract

From the fronds of the following ferns the flavonoid compounds, including three new glycosides, were isolated and their structures elucidated by chemical and spectroscopic methods. From Brainea insignis J. SM. a new flavonol acylglycoside kaempferol 3-O[2-O-(6-O-caffeoyl)-β-D-glucopyranosyl]-β-D-galactopyranoside (I), from Thelypteris palustris SCHOTT a new flavanone glycoside (2S)-5, 7-dihydroxy-6-methylflavanone 7-O-β-D-glucopyranoside (II), cryptostrobin ((2S)-5, 7-dihydroxy-8-methylflavanone), kaempferol 3-O-β-D-glucopyranoside and kaempferol 3-O-β-rutinoside and from Adiantum malesianum GATAK. a new flavonol glycoside kaempferol 3-O-α-D-galactopyranoside (III), vitexin, isovitexin, hyperin (quercetin 3-O-β-D-galactopyranoside) and kaempferol 3-O-β-D-galactopyranoside were isolated.