In addition to berberine, allocryptopine, protopine, sanguinarine and chelerythrine other alkaloids have been isolated from Argemone albiflora HORNEM., i.e. norchelerythrine, norsanguinarine, (-)-scoulerine, (-)-β-scoulerine methohydroxide, and three additional bases, alkaloid AA 1, AA 2, and AA 3. Simultaneously the identity of the alkaloid HF 1 from Hunnemannia fumariaefolia SWEET and (-)-scoulerine has been established.