Further sesquiterpene lactones of Centaurea bella

Aerial parts of Centaurea bella afforded five further guaianolides: cynaropicrin, 19-desoxychlorojanerin, 8-deacyloxy-8 alpha-[2-methylacryloxy]-subluteolide, and two new ones, 3 alpha-isobutyroxy-8 alpha-hydroxy-1 alpha H,5 alpha H,6 beta H,7 alpha H,-guai-4(15),10(14),11(13)-triene-6,12-olide (ceb...

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Veröffentlicht in:	Phytochemistry (Oxford) 1993, Vol.32 (1), p.204-205
Hauptverfasser:	Daniewski, W.M, Nowalk, G
Format:	Artikel
Sprache:	eng
Schlagworte:	Biological and medical sciences Centaurea chemical constituents of plants Chemical constitution chemical structure Fundamental and applied biological sciences. Psychology lactones molecular conformation Plant physiology and development sesquiterpenoids spectral analysis
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Zusammenfassung:	Aerial parts of Centaurea bella afforded five further guaianolides: cynaropicrin, 19-desoxychlorojanerin, 8-deacyloxy-8 alpha-[2-methylacryloxy]-subluteolide, and two new ones, 3 alpha-isobutyroxy-8 alpha-hydroxy-1 alpha H,5 alpha H,6 beta H,7 alpha H,-guai-4(15),10(14),11(13)-triene-6,12-olide (cebellin N) and 3 alpha-isobutyroxy-8 alpha-hydroxy-1 alpha H,5 alpha H,6 beta H,7 alpha H-guai-4(15),10(14),11(3)-triene-6,12-olide (cebellin O). The structures of the new compounds were established by spectroscopy.
ISSN:	0031-9422 1873-3700