Dimeric xanthones from Garcinia livingstonei
From the root bark of Garcinia livingstonei, three xanthone dimers have been isolated. Structure elucidation was achieved mainly by NMR and mass spectrometry, including extensive NOE difference measurements, and by comparison with monomeric prenylated xanthones previously isolated from the same plan...
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Published in | Phytochemistry (Oxford) Vol. 31; no. 10; pp. 3589 - 3593 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
OXFORD
Elsevier Ltd
01.10.1992
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | From the root bark of
Garcinia livingstonei, three xanthone dimers have been isolated. Structure elucidation was achieved mainly by NMR and mass spectrometry, including extensive NOE difference measurements, and by comparison with monomeric prenylated xanthones previously isolated from the same plant. Garcilivin A–C are structurally related to 1,4,5-trihydroxy-3-(3-methylbut-2-enyl)-9
H-xanthen-9-one and formally derive from the corresponding diene via dimerization by a Diels-Alder-type reaction. |
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ISSN: | 0031-9422 1873-3700 |
DOI: | 10.1016/0031-9422(92)83732-E |