英文别名2,3-dihydro-1-Methyl-3-oxo-1H-Pyrazole-4-carboxylic acid ethyl ester; Ethyl 1-Methyl-3-oxo-2,3-dihydropyrazole-4-carboxylate; 3-Hydroxy-1-methylpyrazole-4-carboxylic acid ethyl ester; 4-Ethoxycarbonyl-3-hydroxy-1-methylpyrazole; Ethyl 3-hydroxy-1-methyl-1H-pyrazole-4-carboxylate; 1H-Pyrazole-4-carboxylic acid, 2,3-dihydro-1-methyl-3-oxo-, ethyl ester; ethyl 2-methyl-5-oxo-1H-pyrazole-4-carboxylate 
