[{"from": "human", "value": "Describe this molecule. [C][O][C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][N][=N][C][=C][Branch2][=Branch1][S][C][=C][C][=C][Branch1][#Branch2][C][=C][C][Ring1][=Branch1][=C][Ring1][#Branch2][O][N][C][=Branch1][C][=O][N][C][=C][C][=C][C][=Branch2][Ring2][O][=C][Branch1][N][C][=Branch1][Branch2][=C][Ring1][=Branch1][C][=C][Ring1][#Branch2][O][N][=N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=C][Branch1][Branch1][C][=C][Ring1][Branch2][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 a naphthalenesulfonic acid that is the free acid form of the dye benzo scarlet 4BNS. The trisodium salt is a direct cotton dye that is also capable of hydrogen bonding to amyloid and giving a dark enough red colour to be useful in diagnostic histology. It is a naphthalenesulfonic acid, a member of naphthols, a bis(azo) compound, a member of azobenzenes, a member of ureas and an aromatic ether. It is a conjugate acid of a benzo scarlet 4BNS(3-)."}]