
%0 Journal Article
%A Crow, WD 
%A Hancox, NC 
%A Johns, SR 
%A Lamberton, JA 
%T New alkaloids of <I>Alstonia constricta</I>
%J Australian Journal of Chemistry
%D 1970/12/01
%V 23
%N 12
%P 2489-2501
%K 
%R https://doi.org/10.1071/CH9702489
%U https://www.publish.csiro.au/paper/CH9702489 
%X In the course of the isolation of reserpine from the tertiary alkaloids of Alstonia constricta root bark, a number of other alkaloids were obtained, and these alkaloids have now been the subject of further study. Alstonidine, a previously known alkaloid for which the provisional structure (6) was suggested, has now been shown to have the stereochemistry depicted in (7a). A new alkaloid, alstonilidine, has been shown to be (8). Vincamajine (9) has been identified, and two new alkaloids, O-3,4,5-trimethoxycinnamoylvincamajine (10) and 0-3,4,5-trimethoxybenzoylquebrachidine (11) have been isolated from the "reserpine concentrate". Another alkaloid, probably C43H50N4O7, appears to be a new member of the "bisindole" group. 
