New Bioactive Macrocyclic Diterpenoids from Euphorbia helioscopia |
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| Authors: | Juan Hua Shi‐Hong Luo Yan Liu Yan‐Chun Liu Yan‐Yun Tan Ling Feng Chao‐Jiang Xiao Ke‐Qin Zhang Sheng‐Hong Li Xue‐Mei Niu |
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| Affiliation: | 1. State Key Laboratory for Conservation and Utilization of Bio‐Resources & Key Laboratory for Microbial Resources of the Ministry of Education, School of Life Sciences, Yunnan University, Kunming, P. R. China;2. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan, P. R. China;3. University of Chinese Academy of Sciences, Beijing, P. R. China |
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| Abstract: | Three new macrocyclic diterpenoids, euphoscopoids A – C ( 1 – 3 ), including two new jatrophanes and a new lathyrane, were isolated from the whole plant of Euphorbia helioscopia. Their structures were elucidated by spectroscopic methods. Antifeedant and cytotoxic activities of these isolates were evaluated. All compounds showed significant antifeedant activity against a generalist plant‐feeding insect, Helicoverpa armigera, with EC50 values ranging from 2.05 to 4.34 μg/cm2. In addition, compound 2 showed moderate cytotoxicity against tumor cell lines NCI‐H1975, HepG2, and MCF‐2, while compounds 1 and 3 were not active at 80 μm . The results suggested not only the defensive function of macrocyclic diterpenoids in E. helioscopia against insect herbivores, but also their potential applications as new natural insect antifeedants. |
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| Keywords: |
Euphorbia helioscopia
Euphoscopoids A – C Diterpenoids Antifeedant activities Cytotoxic activities |
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