Norditerpenoid alkaloids from the aerial parts of Aconitum cochleare WOROSCHIN

From the aerial parts of Aconitum cochleare WOROSCHIN, two new norditerpenoid alkaloids named aconitilearine (1) and N-deethylmethyllycaconitine (2) were isolated along with the eight known norditerpenoid alkaloids 3-10. The structures for the new compounds were established on the basis of H-1, C-13, DEPT, homonuclear H-1,H-1-COSY, NOESY, HSQC, and HMBC NMR studies.