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Paper | Regular issue | Vol 29, No. 7, 1989, pp.1293-1300
Published online, 1st January, 1970
DOI: 10.3987/COM-89-4967
Two New Diterpenoid Alkaloids from Delphinium pacific giant and Revised 13C-Nmr Assignment of Delpheline

Hideo Bando, Koji Wada, Junko Tanaka, Sachie Kimura, Ekumi Hasegawa, and Takashi Amiya

*Hokkaido College of Pharmacy, 7-1 Katsuraoka-cho, Otaru 047-02, Japan


Two new C19-diterpenoid alkaloids, paciline (1) and pacinine (2), and a known alkaloid, delpheline (1) were isolated from Delphinium pacific giant. Structures of those alkaloids were determined on the basis of their spectral data and chemical correlation with delpheline (3). Paciline (1) was afforded by methylation of delpheline (3) and pacinine (2) was afforded by oxidation of delpheline (3). 13C-Chemical shifts assigned to C-1, C-9, C-10, C-14, and C-16 of delpheline (3) were revised on the basis of 2D nmr measurement.