3-(carboethoxy)-4-chloro-4-methyl-2-pyrazolin-5-one

2-甲基乙酰乙酸乙酯

3,4-二甲基-5-吡唑啉酮

4-氯-3,4-二甲基-2-吡唑啉-5-酮

3-(carboethoxy)-4,4-dichloro-2-pyrazolin-5-one