1,3-二甲基-6-氨基脲嘧啶

1,3-dimethyl-5-phenyl-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine-2,4-dione

1,3,5,6-tetramethylpyrido[2,3-d]pyrimidine-2,4-dione

5-ethyl-1,3-dimethylpyrido[2,3-d]pyrimidine-2,4-dione

1,3-dimethylpyrido[2,3-d]pyrimidine-2,4-dione