Abstract: Seven diterpenoid alkaloids and one diterpenoid mixtures were isolated from the low-polar fraction of Aconitum vilmorinianum var. altifidum W.T.Wang by repeated column chromatography.Their structures were elucidated on the basis of their physic-chemical properties and by NMR spectral analysis.The alkaloids were identified as vilmorrianine D (1),hemsleyaconitine G (2),hemsleyaconitine F (3),hemsleyaconitine A (4),14-O-veratroylneoline (5),talatisamine (6),lipoyunaconitine (7) and hemsleyadine (8).All the alkaloids were obtained from this plant for the first time.

Key words: Aconitum vilmorinianum var. altifidum, low-polar fraction;diterpenoid alkaloids