英文同义词: | 3,4-Dimethyl-2-pyrazolin-5-one;Einecs 229-608-6;2,4-Dihydro-4,5-dimethyl-3H-pyrazol-3-one;4,5-Dihydro-3,4-dimethyl-1H-pyrazol-5-one, 3,4-Dimethyl-2-pyrazolin-5-one;3,4-dimethyl-5-pyrazolone;4,5-Dimethyl-1,2-dihydro-pyrazol-3-one;3,4-DIMETHYL-4,5-DIHYDRO-1H-PYRAZOL-5-ONE;3,4-DIMETHYLPYRAZOLIN-5-ONE |