3-(4-methoxyphenyl)imidazolidine-2,4-dione

3-(4-硝基苯基)-2,4-咪唑啉二酮

1,5-diphenyl-1,2,5,6-tetrahydro-[1,2,4]triazolo[1,2-a][1,2,4]triazole-3,7-dione

8-甲氧基喹唑啉-2,4(1h,3h)-二酮

7-甲基喹唑啉-2,4(1H,3H)-二酮