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Journal article

Unedoside derivatives in Nuxia and their biosynthesis

By Jensen, Søren Rosendal1; Ravnkilde, Lene2; Schripsema, Jan1

From

Department of Organic Chemistry, Technical University of Denmark1

Technical University of Denmark2

An investigation of two species of Nuxia showed that this genus is characterized by the presence of the eight-carbon iridoid glucoside unedoside and/or its derivatives. From N. floribunda unedoside, nuxioside (6-O-alpha-L-rhamnopyranosyl-unedoside) and 2 "-acetyl-3 "-cinnamoyl-nuxioside were isolated, while from N. oppositifolia 2 "-acetyl-3 "-benzoyl-nuxioside was obtained.

Both plants contained verbascoside. The biosynthesis of unedoside in N. floribunda was investigated and deoxyloganic acid was found to be a precursor, similar to wh;lt was found for the eight-carbon iridoids in Thunbergia alata earlier investigated. The taxonomic position of Nuxia and Buddlejaceae is briefly discussed. (C) 1998 Elsevier Science Ltd.

All rights reserved.

Language: English
Year: 1998
Pages: 1007-1011
ISSN: 18733700 and 00319422
Types: Journal article
DOI: 10.1016/S0031-9422(97)00536-0
Keywords

2″-acetyl-3″-benzoyl-nuxioside 2″-acetyl-3″-cinnamoyl-nuxioside 6-O-α-l-rhamnopyranosyl-unedoside Buddlejaceae N. floribunda Nuxia oppositifolia biosynthesis chemotaxonomy iridoid glucosides nuxioside unedoside verbascoside

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