SMILES: CC1=C(C=CC(=C1)C2=CC(=C(C=C2)N=NC3=C(C4=C(C=C(C=C4C=C3S(=O)(=O)O)S(=O)(=O)O)N)O)C)N=NC5=C(C6=C(C=C(C=C6C=C5S(=O)(=O)O)S(=O)(=O)O)N)O
Description: The molecule is an aminonaphthalenesulfonic acid that is the free acid form of trypan blue dye. It has a role as a dye. It is a member of naphthols, an aminonaphthalenesulfonic acid and a member of azobenzenes. It is a conjugate acid of a trypan blue(4-).