No abstract

A new norditerpenoid alkaloid, manshuritine (1) has been isolated from Aconitum manshuricum, together with seven known alkaloids; beiwudine (2), beiwutine (3), 16-epi-pyromesaconitine (4), mesaconitine (5), aconitine (6), hypaconitine (7) and 14-benzoylmesaconine (8). The structure of the new compound was elucidated on the basis of spectral data and chemical correlations.

No abstract

The acid-catalyzed isomerization of 24-methylenecycloartanol with sulfuric acid afforded cyclosadol (23E-Δ23), isocyclosadol (23Z-Δ23), and other isomers, including lanostane- and cucurbitane-type isomers with (23E)- and (23Z)-Δ23- and Δ24-unsaturated side chains. The phytochemical significance of the isomers is discussed.

No abstract