英文别名(3-Chloro-2-oxo-2H-pyrazin-1-yl)-acetic acid ethyl ester; 1(2H)-Pyrazineacetic acid, 3-chloro-2-oxo-, ethyl ester; Ethyl 2-(6-chloro-5-oxo-4,5-dihydropyrazin-2-yl)acetate; 3-chloro-2-oxo-1(2H)-Pyrazineacetic acid Ethyl ester; ethyl 2-(3-chloro-2-oxo-1,2-dihydropyrazin-1-yl)acetate; Ethyl 3-chloro-2-oxo-1(2H)-pyrazineacetate; ethyl 2-(5-chloro-6-oxo-1H-pyrazin-3-yl)acetate 
