1,3,6-三甲基-5-硝基-2,4(1H,3H)-嘧啶二酮

5-methyl-4-(2-phenylhydrazinyl)pyrazol-3-one

3-甲基-2-吡唑啉-5-酮

3-甲基-3-吡唑啉-5-酮

5-methyl-4-nitroso-1,2-dihydropyrazol-3-one