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Sterol composition from inflorescences of Hieracium pilosella L.

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Author(s): Tadeusz Krzaczek | Monika Gawrońska-Grzywacz

Journal: Acta Societatis Botanicorum Poloniae
ISSN 0001-6977

Volume: 75;
Issue: 1;
Start page: 29;
Date: 2006;
Original page

Keywords: Hieracium pilosella | phytosterols | GC-MS

ABSTRACT
The fraction of sterol acetates from the inflorescences of Hieracium pilosella has been isolated in the typical way from petroleum ether extract. By means of the weight method the total amount of sterols was determined (0.2659%). The mixtures of sterol acetates and free sterols were investigated using GC-MS techniques. The occurrence of about 18 sterols has been observed. Cholesterol, cholest-8(14)-en-3b-ol, cholesta-5.7-dien-3b-ol, cholest-7-en-3b-ol, ergosta-5.24-dien-3b-ol, campesterol, stigmasterol, b-sitosterol, fucosterol, 5a-stigmast-7-en-3a-ol were identified. The probable structures of lophenol, isofucosterol, 5a-stigmasta-7.24-dien-3b-ol, lanosta-9(11).24-dien-3b-ol and 24-ethylidene lophenol were stated on the basis of literature data. The last 4 sterols occur in a vestigial quantity, which made its identification impossible. Sitos erol and cholesterol are remarkably dominating sterols in the fraction.
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