[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=C][C][=Branch2][Ring2][#C][=C][Ring1][#Branch1][N][=N][C][=C][Branch2][Ring1][=N][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][=N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][O-1][S][=Branch1][C][=O][=Branch1][C][=O][O-1][O].[Na+1].[Na+1]"}, {"from": "gpt", "value": "The molecule is an organic sodium salt having 2-[(2-hydroxynaphthalen-1-yl)diazenyl]-5-[(4-sulfonatophenyl)diazenyl]benzene-1-sulfonate as the counterion. Used as a plasma stain in Masson's trichrome. It has a role as a histological dye. It contains a Biebrich scarlet(2-)."}]