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Published on: June 12, 2026
Two novel glycosidic triterpene alkaloids from the stem barks of Machilus yaoshansis
Ming-Tao Liu1, Sheng Lin, Ying-Hong Wang
1Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, People's Republic of China.
Abstract:
[structure: see text] Two unusual glycosidic triterpene alkaloids, machilaminosides A (1) and B (2), have been isolated from the stem barks of Machilus yaoshansis. Their structures were elucidated by detailed spectroscopic analysis. A possible biogenetic origin of 1 and 2 mediated by the coupling of 2-O-beta-D-glucopyranosyl-cucurbitacin I, respectively, with urea and adenosine was postulated. 1 and 2 showed nonselective cytotoxic activities against several human cancer cell lines as well as TNF-alpha secretion inhibitory activities.
