6-(bromomethyl)-5-methylpyrido[2,3-d]pyrimidine-2,4-diamine

ethyl 4-methyl-2-phenylpyrimidine-5-carboxylate

Ethyl 7-methyl-2-phenylpyrazolo[1,5-a]pyrimidine-6-carboxylate

ethyl 2-(anilinomethylidene)-3-oxobutanoate

Ethyl 4-methyl-2-thioxo-1,2-dihydro-5-pyrimidinecarboxylate