Occurrence of Longicaudatine, a New Type of Bis-Indole Base and Bisnor-C-alkaloid H in Strychnos Species

Abstract

The structure of longicaudatine, a novel bis-indole alkaloid isolated from several Strychnos species, has been elucidated chiefly by 400-MHz 1H NMR and 13C NMR spectroscopy. In some species this alkaloid co-occurs with bisnor-C-alkaloid H, an isomeric base which has similar chromatographic and chromogenic properties