
%0 Journal Article
%A Knox, JR 
%A Slobbe, J 
%T Indole alkaloids from <I>Ervatamia orientalis</I>. II. The constitution of the ervatamine group
%J Australian Journal of Chemistry
%D 1975/08/01
%V 28
%N 8
%P 1825-1841
%K 
%R https://doi.org/10.1071/CH9751825
%U https://www.publish.csiro.au/paper/CH9751825 
%X This paper describes the combination of physical and chemical degradative methods that has led to the elucidation of the constitution of the novel 2-acylindole alkaloids, ervatamine (5), 20-epi-ervatamine (6) and 19-dehydroervatamine (7). The alkaloids show differences in the N.M.R. spectra and in the rates of methylation which indicate that ervatamine has a different conformation from the other two alkaloids; the conformations which are suggested for the alkaloids (35)-(37) have alternative chair conformations of the piperidine rings. Correlations in the mass spectra of the natural alkaloids and of several simple derivatives are discussed. 
