
%0 Journal Article
%A Roitman, JN 
%T Longitubine and Neolatifoline, New Pyrrolizidine Alkaloids From <I>Hackelia longituba</I>
%J Australian Journal of Chemistry
%D 1998/12/01
%V 41
%N 12
%P 1827-1833
%K 
%R https://doi.org/10.1071/CH9881827
%U https://www.publish.csiro.au/paper/CH9881827 
%X Methanolic extracts of freeze-dried Hackelia longituba I. M. Johnston (Boraginaceae) afforded two new pyrrolizidine alkaloids: longitubine (1), an analogue of latifoline (2) in which an acetoxy group has replaced the angeloxy group at C7 and neolatifoline (3a) or (3b), a diastereomer of latifoline esterified at C9 with a stereoisomer of latifolic acid. In addition, the known alkaloids latifoline (2), 9-angelylretronecine (4) and 7-angelylretronecine (5) were isolated and identified. 
