Iridoid Glucosides from Picconia excelsa

Søren Damtoft, Henrik Franzyk, Søren Rosendal Jensen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    An investigation of the iridoids of Picconia excelsa from Tenerife provided 17 iridoid glucosides together with verbascoside. Major constituents (> 0.5%) were loganin, ketologanin, oleoacteoside and the new picconioside I-a bisiridoid consisting of loganin esterified with deoxyloganin. Minor constituents were secoxyloganin, 8-epi-kingiside, 8-epi-kingisidic, oleoside 11-methyl ester, excelsioside, ligstroside and loganic acid together with the new compounds ketologanic acid, 6 beta-hydroxy-7-epi-loganin and picconiosides II-V, the latter four being esters of loganin and menthiafolic, foliamenthic, 6-(Z)-foliamenthic or 6,7-dihydrofoliamenthic acid. The structures were mainly elucidated by NMR spectroscopy. (C) 1997 Elsevier Science Ltd.
    Original languageEnglish
    JournalPhytochemistry
    Volume45
    Issue number4
    Pages (from-to)743-750
    ISSN0031-9422
    DOIs
    Publication statusPublished - 1997

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