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Original Articles

Sesquiterpenes from Dysoxylum oliganthum and Dysoxylum excelsum

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Pages 224-234 | Received 23 Aug 2011, Accepted 29 Nov 2011, Published online: 17 Jan 2012
 

Abstract

Three new sesquiterpenes (13), (6R,7S,11R,10S)-15-hydroxy-sesquisabinene hydrate (1), (6R,7R,11S,10S)-15-hydroxy-sesquisabinene hydrate (2), and (6R,7R,10S)-15-hydroxy-zingiberenol (3), along with three known compounds, were isolated from the stems of Dysoxylum oliganthum; and three new isodaucane (salvionane) sesquiterpenes, namely isodauc-6-ene-10β,14-diol (4), 4-epi-isodauc-6-ene-10β,14-diol (5), and 4-epi-6α,10β-dihydroxy-artabotrol (6) together with 15 known compounds were isolated from the twigs and leaves of D. excelsum. Their structures were established on the basis of extensive spectroscopic analysis and chemical shifts. The absolute configuration of C-10 in compounds 13 of a rare class was determined by using Snatzke's method.

Acknowledgements

Financial support of the National Natural Science Foundation (Grant No. 21072203) and Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Peking Union Medical College, Ministry of Education (Grant No. 2010JZ-W-03) of People's Republic of China is gratefully acknowledged. We thank Prof. Y.-K. Xu for the collection and identification of these plant materials.

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