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Communication | Regular issue | Vol 22, No. 1, 1984, pp.17-20
Published online, 1st January, 1970
DOI: 10.3987/R-1984-01-0017
Structures of Gadenine and Pentagyline, Two New Diterpenoid Alkaloids

Antonio G. González,* Gabriel de la Fuente, and Rafael Díaz Acosta

*Instituto de Productos Naturales y Agrobiologia de Canrias, C. S. I. C./ Unversidad de La Laguna, P.O. Box 195, 38206- La Laguna, Tenerife, Spain


The structures of pentagyline and gadenine, two new diterpenoid alkaloids isolated from Delphinium pentagynum, were determined with the aid of 1H and 13C-NMR spectroscopy. A biogenetic scheme is proposed by which karakoline could afford the C-19 diterpenoid alkaloids found in this plant.