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Paper | Regular issue | Vol 29, No. 11, 1989, pp.2141-2148
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5139
Studies on Aconitum Species. XI. Two New Diterpenoid Alkaloids from Aconitum yesoense var. Macroyesoense (Nakai) Tamura V

Koji Wada, Hideo Bando,* Takashi Amiya, and Norio Kawahara

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

Abstract

A new C20-diterpenoid alkaloid, yesonine (1), a new C19-diterpenoid alkaloid, α-oxobrowniine (2), and five known alkaloids were isolated from Aconitum yesoense var. macroyesoense (Nakai) Tamura. Structures of those new alkaloids were determined on the basis of their spectral and chemical correlation with known alkaloids. Hydrolysis of yesoline (9) and permanganate oxidation of browniine (10) afforded yesonine (1) and α-oxobrowniine (5), respectively.