1H-Pyrazole-4-carboxylicacid, 3-hydrazino-5-methyl-, ethyl ester (9CI); Pyrazole-4-carboxylic acid,3(or 5)-hydrazino-5(or 3)-methyl-, ethyl ester (6CI); Pyrazole-4-carboxylicacid, 3-hydrazino-5-methyl-, ethyl ester (8CI);3-Methyl-4-ethoxycarbonyl-5-hydrazino-1H-pyrazole;4-(Ethoxycarbonyl)-3-methyl-5-pyrazolylhydrazine; Ethyl 3-hydrazino-5-methylpyrazole-4-carboxylate;Ethyl 5-hydrazino-3-methylpyrazole-4-carboxylate
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