Abstract
Florisil column chromatography was demonstrated to be effective in differentiation between different forms of sterols. Sterols of ground soybeans are in four forms, free, ester, and free and acylated glucosides, as analyzed on acetone extracts. In soybean oil foots, steryl ester is present in negligibly small amount. The acylated steryl glucosides were isolated from oil foots in a crystalline state. A chemical structure, steryl 6-acyl d-glucoside, was assigned to the compound, and its probable identity with the glucosides reported by Lepage is discussed. The acylated glucoside preparation was shown to be heterogeneous in composition, carrying palmitic, stearic, oleic, linoleic and linolenic acids as the main acyl moieties and campesterol, stigmasterol and β-sitosterol as steryl moieties. The presence of the three sterols is common to three other forms of sterols.
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