Four new diterpenoid alkaloids demethyllappaconitine; 7,11,14-trihydro
xy-2,13-dioxohetisane, 6,13,15-trihydroxyhetisane and N-deethyldelphat
ine, were isolated from Aconitum orientale, in addition to the previou
sly known compounds, lappaconitine, lycoctonine and browniine. The str
uctures of the new and the known alkaloids were established from spect
ral data.