The molecule is an organosulfonate oxoanion obtained by deprotonation of the sulfo groups of 1,3,4,5,7,8-hexahydroxy-9,10-dioxo-9,10-dihydroanthracene-2,6-disulfonic acid. It is a conjugate base of a 1,3,4,5,7,8-hexahydroxy-9,10-dioxo-9,10-dihydroanthracene-2,6-disulfonic acid.
1,3,4,5,7,8-hexahydroxy-9,10-dioxoanthracene-2,6-disulfonate