1,3-dimethyl-hexahydro-{1,3,5}triazine-2,4,6-trione

2,3,6-三甲基-4(3H)-嘧啶酮

甲酸

1-乙基-3,7-二甲基嘌呤-2,6-二酮

4-amino-1-methyl-6-(N'-methyl-ureido)-1H-[1,3,5]triazin-2-one