1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-, 3-ethyl ester, sodium salt (1:1);2-Pyrazoline-3-carboxylic acid, 5-oxo-1-(p-sulfophenyl)-, 3-ethyl ester, sodium salt (8CI);1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-, 3-ethyl ester, sodium salt (9CI);
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