Structure Determination of a Sesquiterpene Lactone Isolated from Nouelia Insignis Franch by 2D NMR

Chinese Journal of Magnetic Resonance ›› 2007, Vol. 24 ›› Issue (2): 141-146.

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Structure Determination of a Sesquiterpene Lactone Isolated from Nouelia Insignis Franch by 2D NMR

HU Xiao-yu；WU Xin-wei；MEI Na；ZHOU Le

1.Northwest A&F University, Yangling 712100, China; 2.Chengdu Institute of Biology, the Chinese Academy of Sciences, Chengdu 610041, China

Received:2006-09-05 Revised:2006-11-29 Online:2007-06-05 Published:2009-12-05
Contact: Zhou Le

Abstract

Abstract: A sesquiterpene lactone was isolated from Nouelia insignis Franch, and its structure was elucidated (compound 1)by 2D NMR to be 8β, 9-dihydro-onoseriolide. Complete assignment of the ¹H and ¹³C chemical shifts for the compound was obtained. The assignments of H-1 and H-2 of the compound previously reported were found incorrect, and the correct assignments were given. The results of this study may have some practical significance for the structural elucidation of onoseriolide sesquiterpene lactones.

Key words: NMR, chemical shift assignment, onoseriolide, Nouelia insignis Franch

HU Xiao-yu；WU Xin-wei；MEI Na；ZHOU Le. Structure Determination of a Sesquiterpene Lactone Isolated from Nouelia Insignis Franch by 2D NMR[J]. Chinese Journal of Magnetic Resonance, 2007, 24(2): 141-146.

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Structure Determination of a Sesquiterpene Lactone Isolated from Nouelia Insignis Franch by 2D NMR

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