
%0 Journal Article
%A Culvenor, CCJ 
%T The alkaloids of <I>Echium plantagineum</I> L
%J Australian Journal of Chemistry
%D 1956/12/01
%V 9
%N 4
%P 512-520
%K 
%R https://doi.org/10.1071/CH9560512
%U https://www.publish.csiro.au/paper/CH9560512 
%X Two new alkaloids, echiumine, C20H31O6N, and echimidine, C20H31O7N, have been isolated from Echium plantagineum L. Both have a retronecine nucleus esterified on the 7-hydroxyl group with angelic acid. The main esterifying acid of echiumine is trachelanthic acid and of echimidine is 2-methyl-2,3,4-trihydroxypentane-3-carboxylic acid, identical with the esterifying acid of heliosupine. The structure of heliosupine, a diastereoisomer of echimidine, has been confirmed. 
