Two styrylpyrone glucosides, 3′-deoxyequisetumpyrone (3,4-hydroxy-6-(4'-hydroxy-E-styryl)-2-pyron-3-O-b-D-glucopyranoside) and 4'-O-methylequisetumpyrone (3,4-hydroxy-6-(3'-hydroxy-4'-methoxy-E-styryl)-2-pyron-3-O-b-D-glucopyranoside) have been isolated from the rhizomes of Equisetum arvense. The structures of the new derivatives were elucidated spectroscopically. These compounds are accumulated as the main phenolics in rhizomes and gametophytes of all Equisetum species. In these organs, they represent a sink for compounds derived from hydroxycinnamoyl CoA esters and malonyl units, whereas sporophytic shoots contain no styrylpyrones but a considerable variety of flavonoid glycosides.
NMR, phenolics, rhizomes, Equisetum arvense, Equisetum sp, Equisetaceae, styrylpyrones
Publication DOI: 10.1016/0031-9422(95)00941-YJournal NLM ID: 0151434Publisher: Elsevier
Institutions: Julius-von-Sachs-Insitut für Biowissenschaften, Lehrstuhl für Pharmazeutische Biologie, Universität Würzburg, Würzburg, F.R.G., FB 13, Botanik, Universität des Saarlandes, Saarbrücken, F.R.G., NZ Institute for Industrial Research and Development, Lower Hutt, New Zealand
Methods: 13C NMR, 1H NMR, FAB-MS, TLC, HPLC
Found