| Member | Definition | Role |
|---|
| 1,2,5,8-tetrahydroxy anthraquinone | A tetrahydroxyanthraquinone having the four hydroxy groups at the 1-, 2-, 5- and 8-positions. | quinalizarin |
| carmine | 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. | carminic acid |
| norsolorinic acid | A polyketide that is anthraquinone bearing four hydroxy substituents at positions 1, 3, 6 and 8 as well as a hexanoyl substituent at position 2. | norsolorinic acid |