- Flavonol glycosides with lipid accumulation inhibitory activity from Sedum sarmentosum
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Three new flavonol glycosides, sarmenosides V-VII (1-3), were isolated from the whole plant of Sedum sarmentosum (Crassulaseae). The structures of 1-3 were determined on the basis of spectroscopic analysis. Among the flavonoid constituents from S. sarment
- Morikawa, Toshio,Ninomiya, Kiyofumi,Zhang, Yi,Yamada, Tomomi,Nakamura, Seikou,Matsuda, Hisashi,Muraoka, Osamu,Hayakawa, Takao,Yoshikawa, Masayuki
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- LEKI POCHODZENIA NATURALNEGO
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From the serial parts of Sedum acre L. have been isolated new acylated flavonoid compound, isorhamnetin 3-O-β-D-glucoyranoside-7-O--β-D-glucopyranoside (mp 174-176 deg C).The structure of compound elucidate by spectroscopic methods (FDMS, IR, UV, 1H-NMR, 13C-NMR)
- Wolbis, Maria
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p. 149 - 152
(2007/10/02)
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- Glucosylation of Quercetin by a Cell Suspension Culture of Vitis sp.
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A cell suspension culture of a Vitis hybrid converted quercetin to six glucosides.Their structures were identified as quercetin 3-O-β-D-glucopyranoside, quercetin 3,4'-di-O-β-D-glucopyranoside, quercetin 3,7-di-O-β-D-glucopyranoside, isorhamnetin 3-O-β-D-glucopyranoside, isorhamnetin 3,4'-di-O-β-D-glucopyranoside, and isorhamnetin 3,7-di-O-β-D-glucopyranoside by UV, FD-MS, 1H-NMR, 13C-NMR spectroscopy and TLC analysis.The course of conversion was also investigated and it was shown that quercetin 3-O-glucoside reached the maximum yield of 31 percent in 24 hr and then gradually disappeared accompanied by the production of quercetin 3,4'- and 3,7-di-O-glucosides.Although the same rise and fall relationship was observed between isorhamnetin 3-O-glucoside and isorhamnetin 3,4'- or 3,7-di-O-glucoside, their conversion ratios were much lower than those of quercetin glucosides.
- Kodama, Tohru,Ishida, Hidekatsu,Kokubo, Tetsuro,Yamakawa, Takashi,Noguchi, Hiroshi
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p. 3283 - 3288
(2007/10/02)
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