Ethyl 4-Azido-2,5-dimethylpyrimidine-6-carboxylate

草酰丙酸二乙酯

ethyl 6-chloro-2,5-dimethyl-pyrimidine-4-carboxylate

2,5-dimethyl-4-oxo-1H-pyrimidine-6-carboxylic acid

ethyl 2,5-dimethyl-4-oxo-1H-pyrimidine-6-carboxylate