A new norditerpenoid alkaloid, elanine, and three known alkaloids, pacinine, delectinine and ajaconine, have been isolated from the seeds of Delphinium elatum. The structures of these alkaloids have been determined on the basis of their spectral data and chemical correlation. Oxidation of delpheline afforded pacinine. 13C chemical shifts assigned to C-3, C-6, C-12 and C-18 of ajaconine have been revised on the basis of DEPT 13C NMR measurements. © 1990.