SMILES: C1=CC=C2C(=C1)C=CC(=C2N=NC3=C(C=C(C=C3)N=NC4=CC=C(C=C4)S(=O)(=O)[O-])S(=O)(=O)[O-])O
Description: The molecule is an organosulfonate oxoanion obtained by deprotonation of the sulfo groups of Biebrich scarlet. It is a conjugate base of a Biebrich scarlet (acid form).