[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=Branch2][Branch1][=N][=C][C][=Branch1][Branch1][=C][Ring1][#Branch1][N][N][=N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=N][C][=C][Branch2][Ring1][#Branch1][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][Ring2][=C][Ring1][#Branch2][S][=Branch1][C][=O][=Branch1][C][=O][O-1][N][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Na+1].[Na+1]"}, {"from": "gpt", "value": "The molecule is an indicator dye that is blue-violet at pH 3.0 and red at pH 5.0. It contains a 3,3'-(biphenyl-4,4'-diyldidiazene-2,1-diyl)bis(4-aminonaphthalene-1-sulfonate). It is functionally related to a 3,3'-(biphenyl-4,4'-diyldidiazene-2,1-diyl)bis(4-aminonaphthalene-1-sulfonic acid)."}]