2,4-diamino-5-methyl-6-(hydroxymethyl)pyrido[2,3-d]pyrimidine

7-chloro-1,3-bis(methoxymethyl)-5-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile

6-(acetoxymethyl)-5-methylpyrido<2,3-d>pyrimidine-2,4(1H,3H)-dione

3-cyano-5-(hydroxymethyl)-4-methyl-2-(methylthio)pyridine

N-((1,3-bis(methoxymethyl)-5-methyl-2,4-dioxo-1,2,3,4-tetrahydropyrido[2,3-d]pyrimidin-6-yl)methyl)acetamide