[{"from": "human", "value": "What can you tell me about this molecule? [C][=C][C][=C][Branch1][N][C][=C][C][=Branch1][=Branch1][=C][Ring1][=Branch1][N][=O][O-1][C][=C][Ring1][=N][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[C][=C][C][=C][Branch1][N][C][=C][C][=Branch1][=Branch1][=C][Ring1][=Branch1][N][=O][O-1][C][=C][Ring1][=N][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[C][=C][C][=C][Branch1][N][C][=C][C][=Branch1][=Branch1][=C][Ring1][=Branch1][N][=O][O-1][C][=C][Ring1][=N][S][=Branch1][C][=O][=Branch1][C][=O][O-1].[Na+1].[Na+1].[Na+1].[Fe+3]"}, {"from": "gpt", "value": "The molecule is an organic sodium salt composed of iron(3+), sodium and 5-(oxidoimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonate ions in a 1:1:3 ratio. Used to stain collagen and animal tissue. It has a role as a histological dye. It is an organic sodium salt and an iron coordination entity. It contains a 5-(oxidoimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonate."}]