Flavonol glycosides in the leaves ofTrillium apetalon Makino andT. kamtschaticum pallas |
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Authors: | Kunijiro Yoshitama Yuko Shida Tsuyoshi Oyamada Nagisa Takasaki Shoji Yahara |
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Affiliation: | (1) Department of Biological Science, Faculty of Science, Kumamoto University, 2-39-1 Kurokami, 860 Kumamoto, Japan;(2) Department of Medicinal Chemistry, Faculty of Pharmaceutical Science, Kumamoto University, Ooehonmachi 5-1, 862 Kumamoto, Japan |
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Abstract: | Seven flavonol glycosides were isolated from the leaves ofT. apetalon. They were identified chromatographically and spectrally to be: quercetin/kaempferol 3-O-α-arabinopyranosyl-(1→6)-β-galactopyranoside (TQ and TK), quercetin/kaempferol 3-O-[2‴-O-acetyl-α-arabinopyranosyl]-(1→6)-β-galactopyranoside (TAQ and TAK), quercetin 3-O-β-glucoside (ISQ), isorhamnetin 3-O-α-arabinopyranosyl-(1→6)-β-galactopyranoside (TI) and isorhamnetin 3-O-[2‴-O-acetyl-α-arabinopyranosyl]-(1→6)-β-galactopyranoside (TAI). TQ, TAQ, TI and TAI were major constituents. This is the first report on two new isorhamnetin-type glycosides, TI and TAI. The seven flavonol glycosides identical to those ofT. apetalon were isolated and identified in the leaves ofT. kamtschaticum; TQ and TAQ were also major components, but TI and TAI were only minor components. TI and TAI were not detected in the leaves ofT. tschonoskii. These leaf-flavonoid patterns were discussed from a chemosystematic point of view. Part 3 in the series “Studies of the flavonoids of the genusTrillium”. For Part 2 see Yoshitamaet al., (1997) J. Plant Res.110: 379–381. |
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Keywords: | Flavonol glycosides Liliaceae (or Trilliaceae) Trillium apetalon T. kamtschaticum |
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