2,6-二氨基-4-嘧啶醇

三甲酰基甲烷

2-amino-6-(dimethoxymethyl)-1H-pyrido[2,3-d]pyrimidin-4-one

2-pivaloyl-6-formyl-5-deazapterin

6-(dimethoxymethyl)pyrido[2,3-d]pyrimidine-2,4-diamine