Carbon‐13 NMR spectroscopic analysis of 24‐methyl‐Δ5,22‐sterols in rape and mustard seed oils
Authors:
- 1 December 1982
- journal article
- research article
- Published by Wiley in Journal of the American Oil Chemists' Society
- Vol. 59 (12) , 521-523
Abstract
24‐Methylcholesta‐5,E‐22‐dien‐3β‐ol (C28 Δ5,22‐sterol) was separated from the unsaponifiable matters of the following eight seed oils of Brassica species:Brassica campestris (candle I and II and torch),B. napus (tower and midas),B. juncea (brown and oriental mustards), andB. alba (yellow mustard). The configuration at C‐24 methyl group of the respective sterols was evaluated by13C NMR spectroscopy. All the C28 Δ5,22‐sterols in the Brassica seed oils were found to contain the C‐24 epimer of brassicasterol,trans‐22‐dehydrocampesterol, in the range of ca. 10–30%.Keywords
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