Kaempferol 3,7,4'-glycosides from the flowers of Clematis cultivars.
A new kaempferol glycoside, kaempferol 3-O-alpha-rhamnopyranosyl-(1 --> 6)-beta-glucopyranoside-7,4'-di-O-beta-glucopyranoside (1) was isolated from the flowers of Clematis cultivars "Jackmanii Superba" and "Fujimusume", together with the known compound kaempferol 3,7,4'-tri-O-beta-glucopyranoside (2). The chemical structures of the isolated kaemferol glycosides were established by UV, 1H and 13C NMR spectroscopy, LC-MS, and characterization of acid hydrolysates.
Laboratory of Plant Chemotaxonomy, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan.
Keisuke
K
Sakaguchi
Junichi
J
Kitajima
Tsukasa
T
Iwashina
D039324:Clematis / Q000737:chemistry*; D035264:Flowers / Q000737:chemistry; D006027:Glycosides / Q000302:isolation & purification; D044949:Kaempferols / Q000302:isolation & purification*
D006027:Glycosides; D044949:Kaempferols