Studies on the Constituents of Solanum Plants. II. On the Constituents of the Immature Berries of Solanum nigrum L.

Abstract
Whole plants of S. nigrum are used to treat cancer in combination with other herbs in Shanghai, China. From the immature berries of this plant, 5 steroidal glycosides, SN-O (I), SN-1 (II), SN-2 (III), SN-3 (IV) and SN-4 (V) were isolated and the former 4 were characterized as 26-O-(.beta.-D-glucopyranosyl)-22-methoxy-25D-5.alpha.-frost-3.beta.,26-diol 3-O-.beta.-lycotetraoside, desgalactotigonin, solamargine and solasonine, respectively. The effects of I, II, III and IV on JTC-26 [mouse neoplastic cells] were examined and it was suggested that II, III and IV possess inhibitory activity against JTC-26 (100, 97.9, 100%, respectively, in a concentration of 15 .mu.g/ml); I has no activity.

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