Abstract
Two new triterpenoids, 3β,6β-dihydroxy-12-oxo-13Hα-olean-28,19β-olide (1) and 3-oxo-olean-11,13(18)-dien-28,19β-olide (2) were isolated from the resin of Styrax tonkinensis (Pier.) Craib. The structures of both triterpenoids were determined by physicochemical and spectroscopic methods. Compound 1 is the second triterpene found with cis-fused C/D ring from the resin, which is rarely observed in oleanane-type triterpenes.
Keywords:
3-oxo-olean-11,13(18)-dien-28,19β-olide; 3β,6β-dihydroxy-12-oxo-13Hα-olean-28,19β-olide; Styrax tonkinensis; triterpenoids.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Drugs, Chinese Herbal / chemistry
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Drugs, Chinese Herbal / isolation & purification*
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Oleanolic Acid / analogs & derivatives
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Oleanolic Acid / chemistry
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Oleanolic Acid / isolation & purification*
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Plant Stems / chemistry
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Resins, Plant / chemistry*
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Styrax / chemistry*
Substances
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3-oxo-olean-11,13(18)-dien-28,19beta-olide
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3beta,6beta-dihydroxy-12-oxo-13Halpha-olean-28,19beta-olide
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Drugs, Chinese Herbal
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Resins, Plant
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Oleanolic Acid