Abstract
Two new natural products, the phenanthrenoid puguenolide (6-hydroxy-3-methoxy-4-oxapyren-5-one) and isoangoletin were isolated from the stem bark of the newly described Uvaria species, U. puguensis D.M. Johnson, together with the sesquiterpene guaiol and the usual C-benzyldihydrochalcones previously found in the genus Uvaria, viz. uvaretin, diuvaretin, chamuvaritin and a mixture of triuvaretin and isotriuvaretin. Structural elucidation was achieved through a combination of spectroscopic methods.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Chalcone / analogs & derivatives
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Chalcone / chemistry
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Chalcone / isolation & purification*
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Heterocyclic Compounds, 4 or More Rings / chemistry
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Heterocyclic Compounds, 4 or More Rings / isolation & purification*
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Medicine, African Traditional*
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Molecular Conformation
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Molecular Structure
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Nuclear Magnetic Resonance, Biomolecular
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Phenanthrenes / chemistry
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Phenanthrenes / isolation & purification*
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Plant Bark / chemistry
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Plant Stems / chemistry
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Pyrones / chemistry
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Pyrones / isolation & purification*
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Spectroscopy, Fourier Transform Infrared
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Tanzania
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Uvaria / chemistry*
Substances
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6-hydroxy-3-methoxy-4-oxapyren-5-one
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Heterocyclic Compounds, 4 or More Rings
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Phenanthrenes
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Pyrones
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isoangoletin
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Chalcone