Four steroidal glycoalkaloids, solasonine [2], solamargine [3], khasianine [4], and ravifoline [5], with solasodine [1] as the aglycone moiety, have been isolated from Solanum platanifolium. The present study involved the characterization of the novel compound 5 by one- and two-dimensional nmr techniques and has also led to the unambiguous and total 13C- and 1H-nmr assignments of all of these steroidal glycoalkaloids and the direct elucidation of their glycosidic linkages.

Solasodine and diosgenin have been widely used as starting materials for the partial synthesis of cortisone, progresterone and C21 steroidal derivatives (oral contraceptives). This study involved the total 'H and "C spectral assignments of these two important compounds by using two-dimensional NMR techniques (COSY, CSCM and HMBC), and resulted in unambiguous spectral assignments, especially in the convoluted regions of the spectra ('H, 0.7-2.0 ppm; 13C, 28-35 ppm).KEY WOKDS Solasodine Diosgenin 13C and 'H spectral assignments 2D NMR

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Using gas chromatography techniques after lipid extraction, soybean hulls were analyzed for their plant sterol components. Soybean hulls contained 7.46% and 2.02% moisture and lipid components, respectively. Three plant sterols, campestrol, stigmasterol, and p-sitosterol, were quantified in the ratios of 1 : 1.5 : 2. The use of soybean hulls as food ingredients was discussed for their potential serum cholesterol reducing effects.