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DOI: 10.1055/s-1999-13978
Georg Thieme Verlag Stuttgart · New York
Sesquiterpene Lactone Glycosides from Arnica longifolia
Publication History
May 29, 1998
September 19, 1998
Publication Date:
31 December 1999 (online)
Abstract:
Flowers of Arnica longifolia were investigated for the occurrence of sesquiterpene lactone glycosides. A mixture containing the two isomeric 11α,13-dihydro- and 11β,13-dihydro-4 H-tomentosin glucosides, previously isolated from A. amplexicaulis and A. mollis, together with the two isomeric 11α,13-dihydro- and 11β,13-dihydro-4H-carabrone glucosides were found in A. longifolia. All carbon and proton shifts of the glycosides could be assigned by their 2D-COSY and 2D-HETCOR spectra and spectroscopy of their respective aglycones, obtained via enzymatic hydrolysis.
Key words:
Arnica longifolia, Asteraceae - sesquiterpene lactones - sesquiterpene lactone glycosides - xanthanolides - xanthanolide glucosides - carabrone glucosides