The molecule is an organosulfonate oxoanion that is the conjugate base of 3,4-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid, obtained by deprotonation of the sulfo group. It is a conjugate base of a 3,4-dihydroxy-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid.
3,4-dihydroxy-9,10-dioxoanthracene-2-sulfonate