STRUCTURES OF POTANIDINE A AND POTANIDINE B

Two new lycoctonine-type C₁₉-diterpenoid alkaloids ,potanidine A(I)and potanid-ine B(II), have been isolated from the roots of Delphinium potaninii W.T.Wang.The structures of thetwo alkaloids were determined on the basis of spectral data and chemi^{cal methods.}