• Title/Summary/Keyword: glycoside

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Sterols and Steryl glycosides from the Root of Codonopsis pilosula (만삼의 Sterol 및 Steryl glycoside에 관한연구)

  • Lee, Ihn-Rhan;Kim, Young-Hee;Park, Sung-Bae
    • Korean Journal of Pharmacognosy
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    • v.13 no.3
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    • pp.129-131
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    • 1982
  • From the roots of Codonopsis pilosula (Franch.) Nannfeldt (Campanulaceae), ${\alpha}$-spinasterol, mp $165{\sim}7^{\circ}$ and alpha-spinasteryl D-glucoside, mp $283{\sim}5^{\circ}$, were isolated and identified on the basis of chemical and spectral data. Spectral data showed that $\Delta^7-stigmasterol$ and its glucoside were contained as minor components.

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Transglycosylation Reaction of Cyclodextrin Glucanotransferase in the Attrition Coupled Reaction System using Raw Starch as a Donor (분쇄마찰매체 불균일상 효소반응계를 활용한 생전분을 당공여체로 하는 Cyclodextrin Glucanotransferase의 당전이 반응)

  • 이용현;백승걸;박동찬;신현동
    • Microbiology and Biotechnology Letters
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    • v.21 no.5
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    • pp.461-467
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    • 1993
  • Transglycosylation reaction of cyclodextrin glucanotransferase (CGTase) was analyzed in the attrition coupled heterogeneous reaction system using raw starch as a donor` and mono-, di-saccharide, and glycoside as acceptors. For transglycosylation reaction of stevioside, the transglycosylation rate was similar and the transglycosylation yield was increased compare with conventional process using liquefied starch as the donor. Also the accumulation of maltooligosaccharides in reaction mixture was minimized.

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Separation and Identification of Cirsimarin from Cirsium Pendulum $F_{ISCH}$ (한국산(韓國産) 엉겅퀴(Cirsium Pendulum $F_{ISCH}$)에서 Cirsimarin의 분리(分離) 및 확인(確認))

  • YunChoi, Hye-Sook;Chang, Il-Moo
    • Korean Journal of Pharmacognosy
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    • v.9 no.3
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    • pp.145-147
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    • 1978
  • Whole plant of Cirsium Pendulum $F_{ISCH}$ was extracted with methanol and a flavonoid glycoside was isolated from the methanol extract. The glycoflavonoid was identified as cirsimarin, $4',5-dihydroxy-6,7-dimethoxyflavone-4'-{\beta}-D-glucopyranoside$.

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Regioselective Synthesis of Ginsenoside $Rh_2$ (진세노사이드 $Rh_2$의 방향선택적 합성)

  • 신명희;정지형;장은하;임광식
    • YAKHAK HOEJI
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    • v.45 no.4
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    • pp.328-333
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    • 2001
  • Ginsenoside Rh$_2$, a minor glycoside constituent of the red ginseng is known as an unique antitumor compound. Several attempts to prepare it in a large scale including semisynthesis from betulafolientriol, an 3-epimer of 20(S)-protopanaxadiol, has been reported. We have previously reported a synthesis of ginsenoside Rh$_2$from 20(S)-protopanaxadiol obtained by alkaline hydrolysis of total ginsenoside. The regioselective synthesis of this compound was achieved by protection of 12-OH group.

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Studies on the Pharmaco-Constituents of Hydrocotyle japonica(II) (Hydrocotyle japonica의 약효성분에 관한 연구 (II))

  • 조의환;김일혁
    • YAKHAK HOEJI
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    • v.35 no.5
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    • pp.427-431
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    • 1991
  • A flavonoidal glycoside was isolated from the whole plant of Hydrocotyle japonica(Um belliferae) and identified as quercetin-3-O-$\beta$-D-galactoside quercetin-3-O-$\beta$-D-(hyperoside) (C$_{21}H_{20}O_{12}$.1/3 $H_2O$, yellow needle crystal, m.p. $249~250^{\circ}$, $[\alpha]^{28}_D^{\circ}$$-65.94^{\circ}$ in pyridine) by physicochemical properties and spectroscopic evidences(UV, IR, NMR and Mass etc., in comparison with authentic sample.

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