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Paper | Regular issue | Vol 38, No. 4, 1994, pp.833-842
Published online, 1st January, 1970
DOI: 10.3987/COM-93-6638
Norditerpenoid Alkaloids from the Aerial Parts of Aconitum balfourii Stapf

Khadga S. Khetwal, Haridutt K. Desai, Balawant S. Joshi, and S. William Pelletier*

*Department of Chemistry, Institute for Natural Products Research, The University of Georgia, Chemistry Building, Athens, Georgia 30602-2556, U.S.A.

Abstract

From the aerial parts of Aconitum balfourii Stapf nine norditerpenoid alkaloids: condelphine (1), bullatine C (2), neoline (3), isotalatizidine (4), 1-O-methyldelphisine (5), pseudaconitine (6), yunaconitine (7), bikhaconitine (8), and indaconitine (9), were isolated. The identity of these alkaloids was determined by comparison of mp, tlc and ir spectra with those of authentic samples and the carbon-13 nmr spectra of 2,5,6,7 and 8 with the published chemical shifts. Detailed nmr spectral studies (1H, 13C, 1H homonuclear COSY, HETCOR, and selective INEPT) carried out on 1,3,4 and 9 have provided accurate chemical shift assignments for these alkaloids.