for the following products
2,7-Anthraquinone disulfonic acid sodium salt | 2,7-Anthraquinonedisulfonic acid disodium salt | Disodium anthraquinone-2,7-disulfonate | Sodium 9,10-dioxo-9,10-dihydroanthracene-2,7-disulfonate and Anthraquinone-2,7-disulfonic acid disodium salt
