Chemistry of the Coccoidea. III. Isolation of a bianthrone glucoside from Callococcus acaciae and of ceroalbolinic acid from Cryptes baccatum (Hemiptera: Insecta)

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Abstract
The major polycyclic constituent of an asterolecaniid Callococcus acaciae (Maskell) is shown to be the 10,l0'-dimer of acetylemodin anthrone glucoside. This follows from hydrolytic, reductive andoxidative reactions. The coccid Cryptes baccatum Maskell is shown to contain ceroalbolinic acid as its principal colouring matter. On decarboxylation it gave isoerythrolaccin, identical with a syntheticspecimen