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Planta Med 1994; 60(6): 572-575
DOI: 10.1055/s-2006-959575
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© Georg Thieme Verlag Stuttgart · New York

Constituents of the Egyptian Centaurea scoparia; Part II. Guaianolides of the Aerial Parts

Diaa Youssef, August W. Frahm
  • Pharmazeutisches Institut der Universität, Hermann-Herder-Str. 9, D-79104 Freiburg, Federal Republic of Germany
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1994

1994

Publikationsdatum:
05. Januar 2007 (online)

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Abstract

Aerial parts of Centaurea scoparia Sieb. afforded a new chlorinated guaianolide with an unusual isobutyl structural feature, diain (1), together with three known guaianolides, janerin (2), cynaropicrin (3), and deacylcynaropicrin (4). Structural assignments of the isolated compounds are based on spectroscopic methods including 1D- and 2D-NMR spectroscopy as well as mass spectroscopy. New and revised 1H- and 13C-NMR data are reported.

Key words

Centaurea scoparia Sieb. - Asteraceae - sesquiterpene lactones - guaianolides - 2D-NMR spectroscopy