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Abstract
A picrotoxane-type sesquiterpene, dendroterpene E (1), together with five benzene derivatives (2–6), were isolated from the stems of Dendrobium nobile Lindl. Their structures were elucidated by spectroscopic analysis and X-ray diffraction analysis. Compound 1 was a new picrotoxane-type sesquiterpene with a C-9/C-1/O/C-11 oxetane ring, which was first encountered in this type of compounds. Compounds 1–3 exhibited inhibitory activities against α-glycosidase.
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Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Funding
This work was supported in part by grants from Hainan Provincial Natural Science Foundation of China (No. 218QN284), Major Technology Project of Hainan Province (No. ZDKJ 201805), Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences (No. 1630052016008).