Four new sesquiterpene glycosides, sonchusides A (6), B (7), C (8) and D (9), have been isolated from Sonchus oleraceus L., together with five known glycosides, glucozaluzanin C (1), macrocliniside A (2), crepidiaside A (3) and picrisides B (4) and C (5). The structures of the new compounds were established on the basis of chemical and spectral data.
