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.
Cited by
32 articles.
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