SMILES: C1=CC=C2C(=C1)C(=O)C3=CC(=C(C(=C3C2=O)O)O)S(=O)(=O)[O-]
Description: 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.