
%0 Journal Article
%A Chan, AWK 
%A Crow, WD 
%T Chemical constituents of <I>Eriococcus confusus</I> Maskell. I. The quinonoid pigments
%J Australian Journal of Chemistry
%D 1966/09/01
%V 19
%N 9
%P 1701-1708
%K 
%R https://doi.org/10.1071/CH9661701
%U https://www.publish.csiro.au/paper/CH9661701 
%X Eriococcus confusus Maskell., growing on both Eucalyptus caesia and maculosa, contains a number of anthraquinone pigments. Emodin has been identified as one of the major components, and the other is tentatively assigned the structure 1,2,3,8-tetrahydroxy-6-methylanthrquinone. Chromatographic and p.m.r, data are presented for a number of anthraquinones, including the new compounds 1,3,5-trihydroxy-6- methylanthraquinone and 1,3,5-trihydroxy-7-methylanthraquinone.   In addition to the pigments, the insects are covered with a waxy secretion, which probably consists of a mixture of long-chain, saturated ketones in the C20-C24 range. 
