pyrimidine,cytosine

1261811-95-3 (2-chloro-5-(perfluorophenyl)pyrimidine)
6-amino-1-benzyl-5-((3,4-dimethoxyphenethyl)amino)pyrimidine-2,4
104408-29-9 (4-hydrazinyl-2-(methylthio)pyrimidine)
5-bromo-4-methyl-2-(methylthio)pyrimidine
102170-34-3 (6-ethylpyrimidine-2,4,5-triamine)