| 英文同义词: | 4-Oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid ethyl ester;ethyl 4-oxopyrido[1,2-a]pyrimidine-3-carboxylate;4H-Pyrido[1,2-a]pyrimidine-4-oxo-3-carboxylic acid ethyl ester;3-Carboethoxy-4H-pyrido[1,2-a]pyrimidin-4-one;4H-Pyrido[1,2-a]pyrimidine-3-carboxylic acid, 4-oxo-, ethyl ester;4-ketopyrido[1,2-a]pyrimidine-3-carboxylic acid ethyl ester;4-oxo-3-pyrido[1,2-a]pyrimidinecarboxylic acid ethyl ester;Ethyl 4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylat |