Thirteen New Xanthone Derivatives from Calophyllum caledonicum (Clusiaceae)

Thirteen New Xanthone Derivatives from Calophyllum caledonicum (Clusiaceae)

An EtOAc extract of the stem bark of Calophyllum caledonicum (Clusiaceae) yielded thirteen new hydroxylated and/or prenylated xanthone derivatives, namely 5-hydroxy-8-methoxyxanthone (1), 3,5-dihydroxy-1,2-dimethoxyxanthone (2), 1,8-dihydroxy-6,7-dimethoxyxanthone (3), 5,7-dihydroxy-2,6-dimethoxyxan...

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Bibliographic Details
Main Authors: Pascal Richomme, Jean Bruneton, Denis Séraphin, Thierry Sévenet, Marc Litaudon, Anne-Emmanuelle Hay, Cécile Morel
Format: Article
Language:English
Published: MDPI AG 2002-01-01
Series:Molecules
Subjects:
NMR
MS
xanthones
Calophyllum caledonicum
Guttiferae
Online Access:http://www.mdpi.com/1420-3049/7/1/38/
Description
Summary:An EtOAc extract of the stem bark of Calophyllum caledonicum (Clusiaceae) yielded thirteen new hydroxylated and/or prenylated xanthone derivatives, namely 5-hydroxy-8-methoxyxanthone (1), 3,5-dihydroxy-1,2-dimethoxyxanthone (2), 1,8-dihydroxy-6,7-dimethoxyxanthone (3), 5,7-dihydroxy-2,6-dimethoxyxanthone (4), 6,8-dihydroxy-3,7-dimethoxy-xanthone (5), 2,5,6,7,8-pentahydroxyxanthone (6), 1,3,8-trihydroxy-5,7-dimethoxyxanthone (7) and according to a previously adopted nomenclature [3], caledonixanthone G-L. (8-13). The structural elucidation of 1-13 were mainly established on the basis of 1D and 2D NMR and HRMS spectroscopic analysis.
ISSN:1420-3049

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