Three new diterpenoid alkaloids, dehydrocardiopetaline, 8-O-cinnamoylgraciline and cossonine, together with cardiopetaline were isolated from Delphinium cossonianum. The structures of the new alkaloids were determined from chemical and spectral evidence, using selective INEPT, HMQC, HMBC and ROESY NMR techniques. © 1993.
- Delphinium cossonianum
- diterpenoid alkaloids