Objective: To study the chemical constituents of Corydalis humosa Migo.
Methods: Some chromatography methods were used to separate the chemical constituents of this plant. Their structures were determined by NMR and MS spectral data.
Results: Six compounds were isolated from the 95% ethanolic extract of the tubers of C. humosa. The structures of these compounds were identified as tetrahydropalmatine (1), jatrorrhizine (2), berberine (3), tetrahydroberberine (4), palmaline (5) and (-)-tetrahydrocoptisine (6) respectively.
Conclusions: Compounds 1-3 were isolated from this plant for the first time.