英文同义词
1-(Carbethoxymethyl)-3-methyl-2-pyrazolin-5-one;1-Carbethoxymethyl-3-methyl-5-pyrazolone;1H-Pyrazole-1-acetic acid, 4,5-dihydro-3-methyl-5-oxo-, ethyl ester;2-Pyrazoline-1-acetic acid, 3-methyl-5-oxo-, ethyl ester;Ethyl 4,5-dihydro-3-methyl-5-oxo-1H-pyrazole-1-acetate