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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,...
Two new labdane‐type diterpenes (adenanthic acids A and B; 1 and 2, resp.) and three new labdane diterpene glycosides (adenanthosides A–C; 3–5, resp.) were isolated from the roots of Isodon adenantha, together with 23 known constituents including seven diterpenoids (6–12), eight triterpenoids (13–20), one lignan glycoside (21), six steroids (22–27), and one ceramide (28). Their structures were elucidated...
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