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Sodium 5-oxo-1-(4-sulfophenyl)-4H-pyrazole-3-carboxylate CAS No.52126-51-9 / Cat No.EBD975
Sodium hydrogen 4,5-dihydro-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate
4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-1H-pyrazole-3-carboxylic acid monosodium salt