[{"from": "human", "value": "Provide a description of this molecule. [C][C][N][Branch2][Ring1][Ring2][C][C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][O-1][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][=Branch2][Ring2][Branch1][=C][C][=C][C][=Branch2][Ring1][=Branch2][=N+1][Branch1][Ring1][C][C][C][C][=C][C][=Branch1][=Branch1][=C][C][=C][Ring1][=Branch1][S][=Branch1][C][=O][=Branch1][C][=O][O-1][C][=C][Ring2][Ring1][Ring2][C][=C][C][=C][C][=C][Ring1][=Branch1].[Na+1]"}, {"from": "gpt", "value": "The molecule is an organic sodium salt having 3-[(ethyl{4-[(4-{ethyl[(3-sulfonatophenyl)methyl]amino}phenyl)(phenyl)methylidene]cyclohexa-2,5-dien-1-ylidene}azaniumyl)methyl]benzene-1-sulfonate. Used as a substitute for Light green SF yellowish in Masson's trichrome, although it is prone to fade. Previously used as a food dye but is now no longer approved. It has a role as a fluorochrome, a food colouring and a histological dye. It contains a Guinee green B(1-)."}]