title: Kaempferol tri- and tetraglycosides from the flowers of Clematis cultivar.
abstract: A new kaempferol glycoside, kaempferol 3-O-alpha-rhamnopyranosyl-(1 --> 2)-[alpha-rhamnopyranosyl-(1 --> 6)-beta-glucopyranoside]-7-O-beta-glucopyranoside (2) was isolated from the flowers of Clematis cultivar "Jackmanii Superba", together with a known kaempferol 3-O-alpha-rhamnopyranosyl-(1 --> 6)-beta-glucopyranoside-7-O-beta-glucopyranoside (1). The chemical structures of the isolated glycosides were established by UV, LC-MS, characterization of acid hydrolysates, and 1H and 13C NMR spectroscopy.
authors.affiliation: 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. kei@kahaku.go.jp
authors.forename: Keisuke
authors.initials: K
authors.lastname: Sakaguchi
authors.forename: Junichi
authors.initials: J
authors.lastname: Kitajima
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Iwashina
mesh_terms: D039324:Clematis / Q000737:chemistry*; D035264:Flowers / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry* / Q000494:pharmacology; D044949:Kaempferols / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D006027:Glycosides; D044949:Kaempferols; C571550:kaempferol-3-O-alpha-rhamnopyranosyl-(1-2)-(alpha-rhamnopyranosyl-(1-6)-beta-glucopyranoside)-7-O-beta-glucopyranoside; C571551:kaempferol-3-O-alpha-rhamnopyranosyl-(1-6)-beta-glucopyranoside-7-O-beta-glucopyranoside