Eight new alkaloids have been obtained from the trunk bark of Ochrosia moorei. These are 10-hydroxydihydrocorynantheol (21), 11-methoxypicraphylline (22), 10,11-dimethoxy-19,20-dihydro-16S,20R-sitsirikine (23) and the closely related Neisosperma is the presence of ellipticine and/or 10-methoxyellipticine in the former, and its or their absence in the latter.