Four new jatrophane-type diterpenoids (1-4), together with 16 known related compounds, were isolated from the Chinese medicinal plant Euphorbia helioscopia. The structures of 1-4 were determined on the basis of spectroscopic and chemical methods. Cytotoxicity of the isolated compounds against HeLa and MDA-MB-231 cells was evaluated, with only helioscopinolide A (5) and euphornin (3a) being active.
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Lu et al. (2008) studied this question.
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