A tetrahydroxyanthraquinone that is that is 1,3,4,6-tetrahydroxy-9,10-anthraquinone substituted by a methyl group at position 8, a carboxy group at position 7 and a 1,5-anhydro-D-glucitol moiety at position 2 via a C-glycosidic linkage. It is a natural dye isolated from several insects such as Dactylopius coccus.
Stars
This entity has been manually annotated by the ChEBI Team.
A dye used in microscopic or electron microscopic examination of cells and tissues to give contrast and to highlight particular features of interest, such as nuclei and cytoplasm.
It was previously thought that it contains α-D-glucopyranosyl residue which was later redetermined to be the β-D-glucopyranosyl anomer. See J.Org.Chem. 1981, 46, 7, 1511.