From the aerial parts of Consolida oliveriana (DC) Schrod. a new nordi
terpenoid alkaloid consolidine (2) has been isolated, in addition to t
he known alkaloids pubescenine (1), gigactonine, and delsoline and the
diterpenoid alkaloid ajaconine (4). The structure of alkaloid 2 was e
stablished on the basis of its physical and spectroscopic data includi
ng detailed NMR studies. A detailed NMR study on ajaconine (4) resulte
d in the revision of 11 C-13 chemical shift assignments.