Unedoside derivatives in Nuxia and their biosynthesis.

Søren Rosendal Jensen, Lene Ravnkilde, Jan Schripsema

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    Abstract

    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.
    Original languageEnglish
    JournalPhytochemistry
    Volume47
    Issue number6
    Pages (from-to)1007-1011
    ISSN0031-9422
    DOIs
    Publication statusPublished - 1998

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