SMILES: C1=CC=C(C=C1)N=NC2=C(C3=C(C=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])O)O
Description: The molecule is an organosulfonate oxoanion resulting from the removal of a proton from both of the sulfo groups of 4,5-dihydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonic acid. It is a conjugate base of a 4,5-dihydroxy-3-(phenyldiazenyl)naphthalene-2,7-disulfonic acid.