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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

Chemical constituents of Eriococcus confusus Maskell. I. The quinonoid pigments

AWK Chan and WD Crow

Australian Journal of Chemistry 19(9) 1701 - 1708
Published: 1966

Abstract

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.

https://doi.org/10.1071/CH9661701

© CSIRO 1966

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