SMILES: C1=CC(=CC=C1N=NC2=CC(=C(C=C2)N=NC3=C4C=CC(=CC4=CC(=C3O)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-]
Description: The molecule is an organosulfonate oxoanion obtained by deprotonation of the sulfo groups of Ponceau S. It is a conjugate base of a Ponceau S (acid form).