Eight alkaloids were isolated from the leaves of Alangium bussyanum, s
ix of which were known, viz. tubulosine, 9-desmethyltubulosine, deoxyd
esmethyltubulosine, O-methyltubulosine, deoxytubulosine and 9- or 10-d
esmethylprotoemetinol. The two other alkaloids were new and their stru
ctures were established as alangiobussine and alangiobussinine by spec
troscopic and chemical methods.