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Abstract
A new sesquiterpene glycoside with a picrotoxane-type aglycone has been isolated from the stems of Dendrobium nobile Lindl. Its structure was elucidated as 7,12-dihydroxy-5-hydroxymethyl-11-isopropyl-6-methyl-9-oxatricyclo[6.2.1.02,6]undecan-10-one-15-O-β-d-glucopyranoside on the basis of spectroscopic data and chemical methods.
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Acknowledgements
This research was supported by The National Natural Science Foundation of China (NO. 30170023) and The Doctor Degree Special Foundation for Authors of Excellent Thesis in Colleges and Universities of China (NO. 199950). Thanks are given to the Department of Institute Analysis, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College for measuring the IR and NMR spectral data. We also thank the National Center of Biomedical Analysis, Academy of Military Medical Sciences for performing the FABMS and the Institute of Chemistry, Chinese Academy of Sciences for measuring the HR-ESIMS.