Kaempferol tri- and tetraglycosides from the flowers of Clematis cultivar |
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| Authors: | Sakaguchi Keisuke Kitajima Junichi Iwashina Tsukasa |
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| 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 |
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| 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. |
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