• Title/Summary/Keyword: Triterpinoid

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Phytochemical study on melandrium firmum

  • Woo, Won-Sicka;Choi, Jae-Sue;Chang, Hye-Soon
    • Archives of Pharmacal Research
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    • v.8 no.3
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    • pp.133-137
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    • 1985
  • The aglycones of saponins isolated from Melandrium firmum were identified as gypsogenin, gypsogenic acid and quillaic acid.

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Studies on Triterpenoid Corticomimetics (IV) - E-Ring Opening of Pomolic Acid by Retrograde Aldol Condensation

  • Han, Yong-Nam;Han, Byung-Hoon;Park, Eun-Tae;Kim, Tae-Hee
    • Archives of Pharmacal Research
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    • v.8 no.4
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    • pp.221-227
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    • 1985
  • Acetyl-11-ketopomolic acid methyl ester (VI), mp 276-$278^{\circ}$ was synthesized from pomolic acid (III). The mild alkaline treatment of VI induced the opening of ring E on carbone skeleton to yield VII, and then VII was deacetylated to give VIII, mp 82-$84^{\circ}$ Compound VIII was established as 11, 19-diketo-18, 19-secoursolic acid methylester. The E-ring opening was believed to be due to regrograde aidol condensation.

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