pyrimidine,cytosine

7-isopropyl-5,6-dihydroimidazo[1,2-a]pyrimidine
40769-68-4 (2-aminopyrimidine-4,5-diol)
2-(pyridin-3-yloxy)pyrimidine-5-carboxylic acid
2-phenyl-6-(pyridin-2-yl)pyrimidine-4-carbaldehyde
6,7-dihydro-5h-pyrrolo[3,4-d]pyrimidine-2-carboxamide