SMILES: C1=CC=C(C=C1)N=NC2=C(C=CC3=CC(=CC(=C32)S(=O)(=O)[O-])S(=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 7-hydroxy-8-[(E)-phenyldiazenyl]naphthalene-1,3-disulfonic acid. It is a conjugate base of a 7-hydroxy-8-[(E)-phenyldiazenyl]naphthalene-1,3-disulfonic acid.