1-甲基巴比妥酸

1,1'-dimethyl[5,5']bipyrimidinyl-2,4,6,2',4',6'-hexaone

1-甲基-6,7-二苯基2,4-二羟基蝶啶

8-(hydroxymethyl)-3-methyl-7H-purine-2,6-dione

8-benzyl-3,7-dimethylpurine-2,6-dione