[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][C][=Branch2][=Branch1][Ring1][=C][C][=C][Ring1][=Branch1][N][=N][C][=C][C][=Branch2][Ring2][=C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=N][C][=C][C][=C][C][=Branch2][Ring1][Branch1][=C][C][Ring1][=Branch1][=C][C][=Branch1][Branch1][=C][Ring1][#Branch2][O][S][=Branch1][C][=O][=Branch1][C][=O][O][S][=Branch1][C][=O][=Branch1][C][=O][O][S][=Branch1][C][=O][=Branch1][C][=O][O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an arenesulfonic acid that is 3-hydroxynaphthalene-2,7-disulfonic acid carrying a {2-sulfo-4-[(4-sulfophenyl)diazenyl]phenyl}diazenyl group at position 4. The tetrasodium salt is the biological stain 'Ponceau S'. It has a role as a histological dye and a fluorochrome. It is an arenesulfonic acid, a member of azobenzenes, a bis(azo) compound and a member of naphthols. It is a conjugate acid of a Ponceau S(4-)."}]