2-methylsulfanyl-6H-pyrido[4,3-d]pyrimidin-5-one
2-methylsulfanyl-pyrido[4.3-d]-pyrimidine
4-methyl-2-methylsulfanyl-pyrimidine-5-carboxylic acid ethyl ester
ethyl 2-benzyl-4-methylpyrimidine-5-carboxylate
ethyl 2,4-dimethylpyrimidine-5-carboxylate