Diterpenoid alkaloids from Delphinium uncinatum

From the aerial parts of Delphinium uncinatum a new diterpenoid uncinatine and four known norditerpenoid alkaloids have been isolated. By spectral data (H-1 and C-13 NMR) the known compounds were established as 14-acetylperegrine, 14-acetylvirescenine, condelphine and delbrusine. The structure of the new alkaloid was deduced by 1D and 2D NMR techniques. (C) 1998 Elsevier Science Ltd. All rights reserved