Weitere Helenanolide aus den Blüten vonArnica chamissonissubsp.foliosa1,2,3
- 1 February 1990
- journal article
- research article
- Published by Georg Thieme Verlag KG in Planta Medica
- Vol. 56 (01) , 111-114
- https://doi.org/10.1055/s-2006-960899
Abstract
A phytochemical study of the flowers of Arnica chamissonis Less. subsp. foliosa (Nutt.) Maguire (Asteraceae) has resulted in the identification of a further 23 helenanolides. Six of them, 2α-hydroxy-6-O-angelicoyl-2,3-dihydrohelenalin (3b), 2α-hydroxy-6-O-senecioyl-2, 3-dihydrohelenalin (3c), 2α-hydroxy-6-O-tigloyl-2,3,11α,13-tetrahydrohelenalin (4a), 2α-hydroxy-6-O-isovaleryl-2, 3,11α,13-tetrahydrohelenalin (4d), 6-O-acetylchamissonolide (5c), and 4,6-di-O-acetylchamissonolide (5d), were isolated for the first time as natural compounds. Their structures were established by GLC-MS studies and IR, 1H- and 13C-NMR spectroscopyKeywords
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