Eight known and three apparently hitherto undescribed diterpenoid alkaloids were isolated from D. nudicaule: hetisine, 2-dehydrohetisine, 6-deoxydelcorine, dictyocarpine, dihydrogadesine, methyllycaconitine, lycoctonine, and takaosamine; and nudicaulamine, nudicauline, and nudicaulidine, the structures of which were deduced.