Journal
PHYTOCHEMISTRY
Volume 66, Issue 14, Pages 1644-1650Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phytochem.2005.06.004
Keywords
Centaurea aspera; Compositae; structural elucidation; synthesis; sesquiterpene lactones; germacranolides; elemanes; chemotaxonomy
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The aerial parts of two subspecies of Centaurea aspera L. (Asteraccae) yielded the germacranolides 1a h, 2, 3, 4 and 5, the elemane derivatives 6d and 6f, the lignan matairesinol, the degraded terpene loliolide, and the onopordopicrin valine dimeric adduct 7. From these, compounds le, 3 and 6d are natural products. The chemical composition of the two Subspecies is very similar, a circumstance which does not support a taxonomic subdivision of the species. (c) 2005 Elsevier Ltd. All rights reserved.
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