Objective: To study the alkaloid constituents of Corydalis adunca.
Method: The constituents were isolated on silica gel column and their structures were elucidated by IR, NMR, MS data.
Result: Eight alkaloid compounds were isolated from alcohol extracts of the herb of C. adunca, and identified as dihydrosanguinarine (I), tetrahydrocolumbamine (II), 1,2,3,4-tetrahydro-7-methoxy-1-[(4-methoxy)phenyl]methyl-8-quinolinol (III), protopine (IV) and 6-acetonyl-5,6-dihydrosanguinarine (V).
Conclusion: Five compounds were isolated from C. adunca for the first time.
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