Six new norditerpenoid alkaloids from Delphinium elatum

Abstract Six new C 19 -norditerpenoid alkaloids, N -formyl-4,19-secopacinine ( 1 ), iminoisodelpheline ( 2 ), iminodelpheline ( 3 ), iminopaciline ( 4 ), 6-dehydroeladine ( 5 ), and elapacidine ( 6 ) were isolated from Delphinium elatum cv. Pacific Giant.