1-(2,4-dimethoxypyrimidin-5-yl)-6,7-dihydro-5H-benzo[c][1,2,3]triazolo[1,5-a]azepine
(Z)-3-(2',4'-dimethoxypyrimidin-5'-yl)methylidene-N-m-chlorophenyl isoindolin-1-one
3-(2,4-dimethoxypyrimidin-5-yl)-1-(p-tolyl)-2-propyn-1-one
5-ethynyluracil
5-acetyluracil