title: The alkaloids of Corydalis meifolia.
abstract: Six tetrahydroprotoberberines, (+)-sinactine, apocavidine, stylopine, (+)-cavidine, cheilanthifoline, and dehydrocavidine; two spirobenzylisoquinolines, yenhusomine and yenhusomidine; one phthalideisoquinoline, corlumine; one benzophenanthridine, dihydrosanguinarine and protopine, have been isolated from the leaves and stems of Corydalis meifolia Wall. Of these alkaloids, dehydrocavidine was a new base. The remaining alkaloids, although known, were isolated for the first time for this plant. (+)-Cavidine, protopine, corlumine, yenhusomine, and dehydrocavidine exhibited spasmolytic activity.
mesh_terms: D000470:Alkaloids / Q000032:analysis* / Q000494:pharmacology; D000818:Animals; D006168:Guinea Pigs; D066298:In Vitro Techniques; D007194:India; D009119:Muscle Contraction / Q000187:drug effects; D010276:Parasympatholytics; D010946:Plants, Medicinal / Q000032:analysis*
chemical_list: D000470:Alkaloids; D010276:Parasympatholytics