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Abstract
Two new dammarane-type triterpenoids, dammar-3α,12(R),20(S)-triol-12,32(R);20,32-diepoxy-25-methy-25-en-tridecacyclic ether (1) and (23E)-12β,20(R),25(S),26-tetrahydroxydammar-23-en-3-one (2) were isolated from the green walnut husks of Juglans mandshurica Maxim together with six known compounds. Their structures were elucidated through extensive spectroscopic analyses and by comparison with the literature, and the cytotoxic activities of these compounds were evaluated.
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Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Funding
This work was supported by the National Science Foundation of China (grant number 81202890), Natural Science Foundation of Heilongjiang Province of China (grant number LH2019H048), China Postdoctoral Science Foundation funded project (grant number 2013M530164 and 2014T70374), Heilongjiang Postdoctoral Fund (grant number LBH-Z13195 and LBH-Q16207).
