Abstract
Thirteen tetrahydroprotoberberines, 2,9,10-thrihydroxy-3-methoxytetrahydroprotoberberine (1), cavidine (2), thalictrifoline (3), mesotetrahydrocorysamine (4), stylopine (5), sinactine (6), apocavidine (7), cheilanthifoline (8), 13-β-hydroxystylopine (9), tetrahydropalmatine (10), tetrahydropalmatrubine (11), isocorypalmine (12), and scoulerine (13) have been isolated from the herb of Corydalis. Saxicola Bunting. Of these alkaloids, 2,9,10-thrihydroxy-3-methoxytetrahydroprotoberberine (1) was a new base. The alkaloids mesotetrahydrocorysamine (4), stylopine (5), sinactine (6), apocavidine (7), cheilanthifoline (8), 13-β-hydroxystylopine (9), tetrahydropalmatine (10), tetrahydropalmatrubine (11), isocorypalmine (12), and scoulerine (13), although previously known, were isolated for the first time from Corydalis saxicola Bunting.
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