1,3-dimethyl-2,4-dioxopteridine-6-carboxylic acid

1,3-dimethyl-8-(thiophen-2-ylmethyl)-7H-purine-2,6-dione

8-[methoxy(phenyl)methyl]-1,3-dimethyl-7H-purine-2,6-dione

1,3-二甲基-8-丙-2-烯基-7H-嘌呤-2,6-二酮

1,3-二甲基-8-[(E)-3-苯基丙-2-烯基]-7H-嘌呤-2,6-二酮