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4-[[4-[[3-(4,5-dichloro-6-oxo-6H-pyridazin-1-yl)propionyl]amino]-2-sulphophenyl]azo]-4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid, sodium salt Structure

4-[[4-[[3-(4,5-dichloro-6-oxo-6H-pyridazin-1-yl)propionyl]amino]-2-sulphophenyl]azo]-4,5-dihydro-5-oxo-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid, sodium salt