elsewhere that Vignaradiataseeds contain a high concentration of γ-glutamyl- S -methylcysteine and its sulphoxide and that these compounds serve as index compounds for the chemotaxonomy of V. radiata . Beside these two γ-glutamylpeptides, nine other γ-glutamyl derivatives, of which three are new compounds, have been isolated and identified from V. radiataseeds. The structures of the new peptides, γ-glutamyl-