The new C-19-norditerpenoid alkaloid sharwuphinine B (1) together with the three known alkaloids anthranoyllycoctonine (inulin) (2), delavaine A (3) and delavaine B (4) were isolated from Delphinium shawurense. The structures of 1-4 were elucidated using 1D and 2D NMR spectral data including high-resolution mass spectra (HR-ESI-MS). It was found that the new compound was one of few quaternary norditerpenoid alkaloids with a C(19)=N+ double bond.