Abstract:Objective:To investigate the diterpenoid alkaloids from Aconitum bulleyanum.Method:Diterpenoid alkaloids were separated by solvent extraction and chromatography on silical gel,and their structures were determined by spectral analysis and chemical evidence.Result:Five diterpenoid alkaloids were elucidated as yunaconitine,crassicauline A,vilmorrianine C,lycoctonine and lappaconitine.Conclusion:All the compounds were isolated from this plant for the first time.