From the whole plants of Aster himalaicus, a new eudesmane-type sesquiterpene, 1-oxoeudesm-11(13)-eno-12,8alpha-lactone, along with twelve known compounds, was isolated. The structures of all compounds have been elucidated on the basis of spectroscopic data, including IR, EI-MS, HR-ESI-MS, and 1D- and 2D-NMR data.

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A new acetophenone derivative, 5-acetyl-2-(2-hydroxyisopropyl)-7-(3,3-dimethylallyl)-2,3-dihydrobenzofuran, has been isolated from the whole plants of Senecio vulgaris. Its structure was established on the basis of spectroscopic methods.

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Investigation of the aerial parts of Senecio ambraceus afforded four eudesmane-type sesquiterpenes (1–4), of which 1 was isolated from a natural source for the first time. Its structure was established on the basis of spectroscopic methods, including IR, EI–MS, HR–ESI–MS, 1D and 2D NMR spectroscopy.