Continued investigation of the alkaloids of Del~hinium bE Franch has led to the isolation and structural determination of four new diterpenoid alkaloids, delbotine (h), delboxine (2). delbonine (5) and delbine (g), together with two known bases, deltamine and deltaline. Structures ; and 2 were confirmed by x-ray analyses. Delboxine (2) and delbine (5) are the first examples of C18-diterpenoid alkaloids bearing C(6)-oxygenated substituent.