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-oxatricyclo6.2.1.0 (2,6)undecan-10-one-15-O-beta--glucopyranoside on the basis of spectroscopic data and chemical methods.
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