Abstract
The genus Senecio (Compositae) is composed of about 1000 species widely distributed in the world except in Antarctica. In China, there are 63 species grown mainly in southwestern area [1]. A great deal of interest in phytochemical studies on plants of the Senecio genus has yielded various types of compounds such as pyrrolizidine alkaloids, sesquiterpenoids, diterpenoids, and flavonoids, with hepatotoxic, carcinogenic, insecticidal, antimicrobial, antitumor, antivirus, antiulcer, and immunosupressing activities [2–6]. Pyrrolizidine alkaloids and sesquiterpenoids have been proved to be the potent constituents of Senecio species and are known to be hepatic toxins and carcinogens [7]. S. scandens was used in traditional Chinese medicine to treat ophthalmic diseases, inflammation, and leptospirosis [8]. Its extracts and compounds were reported to possess significant antimicrobial and antiinflammatory activities [2, 9–10], but there are no references about the oil content and chemical composition of its fresh flower. We report here the results of our studies on the composition of oil from the fresh flowers of S. scandens.
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