英文同义词: | ethyl 4-oxo-4,9a-dihydro-1H-pyrimido[1,2-a]pyrimidine-3-carboxylate;4H-Pyrimido[1,2-a]pyrimidine-4-oxo-3-carboxylic acid ethyl ester;4-Oxo-1,9a-dihydro-4H-pyrimido[1,2-a]pyrimidine-3-carboxylic acid ethyl ester;4H-Pyrimido[1,2-a]pyrimidine-3-carboxylic acid, 4-oxo-, ethyl ester |