Two new γ-glutamylpeptides (γ-L-glutamyl-α-methylene-β-aminopropionic acid, γ-L-glutamyl-ethyl-β-aminoisobutyrate) together with γ-L-glutamyl-β-aminoisobutyric acid have been isolated from seeds of Rhynchosia albiflora. The structures were determined by chemical and physical methods.