Three new C20-diterpenoid alkaloids from Delphinium anthriscifolium var. savatieri

Three new C20-diterpenoid alkaloids, designated as anthriscifolmines A–C (1–3), together with two known alkaloids denudatine and delgramine, were isolated from the whole herb of Delphinium anthriscifolium var. savatieri. The structures of these new alkaloids were elucidated on the basis of spectral data.