[Alkaloid constituents of Corydalis adunca]

To study the alkaloid component of Corydalis adunca Maxim.The constituents were isolated by chromatographic methods, their structures were elucidated by spectroscopic evidences.Three compounds were purified and their structures were identified, they were identified as dorydaline (I), dehydrocorydaline (II), dihydrosanguinarine (III).Compounds I , II are isolated from this plant for the first time.