Rings D-seco and B,D-seco tetranortriterpenoids from root bark of Entandrophragma angolense
| Autor: | Hiroaki Okamura, Tienabe K. Nsiama, Munehiro Nakatani, Tetsuo Iwagawa, Matsumi Doe, Toshiyuki Hamada, Yoshiki Morimoto |
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| Rok vydání: | 2011 |
| Předmět: |
Limonins
Magnetic Resonance Spectroscopy Stereochemistry Plant Science Horticulture Limonoid Plant Roots Biochemistry Mass Spectrometry chemistry.chemical_compound Furan medicine Secosteroids Moiety Methyl angolensate Meliaceae Furans Molecular Biology Molecular Structure biology Plant Extracts General Medicine Entandrophragma angolense biology.organism_classification Triterpenes chemistry visual_art Plant Bark visual_art.visual_art_medium Bark medicine.drug |
| Zdroj: | Phytochemistry. 72:1854-1858 |
| ISSN: | 0031-9422 |
| Popis: | Investigation of the root bark extract of Entandrophragma angolense led to identification of two gedunin-type limonoids 5-hydroxy-7-deacetoxy-7-oxogedunin ( 1 ) and 5,6-dehydro-7-deacetoxy-7-oxogedunin ( 2 ), and three methyl angolensate derivatives, 6-deacetoxydomesticulide D ( 3 ), 6-deacetoxydomesticulide D 21-methylether ( 4 ), and entangosin ( 5 ), together with known compounds, methyl angolensate ( 6 ), 6-acetoxymethyl angolensate ( 7 ) and secomahoganin ( 8 ). Their structures were established by extensive NMR experiments in conjunction with mass spectrometry. Entangosin is a rare example of a limonoid derivative having a fully O -substituted furan moiety. |
| Databáze: | OpenAIRE |
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