
%0 Journal Article
%A Johns, SR 
%A Lamberton, JA 
%A Li, CS 
%A Sioumis, AA 
%T New alkaloids from a <I>Popowia</I> species (Annonaceae)
%J Australian Journal of Chemistry
%D 1970/02/01
%V 23
%N 2
%P 363-368
%K 
%R https://doi.org/10.1071/CH9700363
%U https://www.publish.csiro.au/paper/CH9700363 
%X A bisbenzylisoquinoline and three noraporphine alkaloids have been isolated from the bark of a Popowia species (Popowia cf. cyanocarpa Laut. 85 K. Schum.) of the family Annonaceae. The major alkaloid is 1-hydroxy-2,9,10-trimethoxynoraporphine (1), and comparison with the known alkaloid wilsonirine, to which the same structure had been assigned, indicates that the Popowia base is the (+)-form, while   wilsonirine is largely racemic. Another alkaloid, 2-hydroxy-1-methoxynoraporphine (3), is identical with the known alkaloid asimilobine, while the third noraporphine, 1-hydroxy-2,10,11-trimethoxynoraporphine (4), has not previously been reported. The bisbenzylisoquinoline alkaloid, dauricine O-methyl ether (6), has not previously been isolated as an alkaloid but it has been prepared as a derivative of dauricine. 
