上游原料
ethyl 3-bromo-2-oxopropanoate;ethyl 3-bromopyruvate;Bromopyruvic acid ethyl ester;ethyl 3-bromopyruvate;ethyl bromopyruvate3,5-dibromo-2-pyrazinamineethyl 6,8-dibromoimidazo[1,2-a]pyrazine-2-carboxylate6,8-dibromoimidazo[1,2-a]pyrazine-2-carboxamide6-bromo-8-chloroimidazo[1,2-a]pyrazine-2-carbonitrile