• Title/Summary/Keyword: anhydroprotopanaxadiol

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Preparation and Structure Determination of a New Glycoside, (20E)-Ginsenoside $Rh_3$, and its isomer from Diol-type Ginseng Saponins (인삼의 diol계 사포닌으로부터 새로운 배당체 (20E)-Ginsenoside $Rh_3$ 및 그의 입체이성체의 제조와 구조결정)

  • 김동선;백남인;박종대;이유희;정소영;이천배;김신일
    • YAKHAK HOEJI
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    • v.39 no.1
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    • pp.85-93
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    • 1995
  • Acidic and alkaline hydrolysis of diol-type ginseng saponins produced a new glycoside, (20E)-ginsenoside Rh$_{3}$, and its stereoisomer (20Z)-, which were further subjected to alkaline by drolysis to give their aglycones, (20E)- and (20Z)-3$\beta$, 12$\beta$-dihydroxy-dammar-20(22),24-diene. The ratio of stereoisomeric mixtures was estimated to be ca. 5:1 from intensities of the peaks in $^{1}$H- and $^{13}$C-NMR spectra. The $^{1}$H- and $^{13}$C-NMR signals of ginsenoside Rh$_{3}$, which have remained unclarified, were completely assigned by the extensive application of modern NMR techniques.

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