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hydrogen 1-(3-sulphonatopropyl)-2-[[1-(3-sulphonatopropyl)-1H-quinolin-2-ylidene]methyl]quinolinium, potassium salt Structure

hydrogen 1-(3-sulphonatopropyl)-2-[[1-(3-sulphonatopropyl)-1H-quinolin-2-ylidene]methyl]quinolinium, potassium salt