Synonyms: 2,2'-Biisonicotinicacid, diethyl ester (6CI,7CI,8CI); [2,2'-Bipyridine]-4,4'-dicarboxylic acid, diethylester (9CI); 2,2'-Bipyridinyl-4,4'-dicarboxylic acid diethyl ester;4,4'-Bis(ethoxycarbonyl)-2,2'-bipyridine; 4,4'-Dicarbethoxy-2,2'-bipyridine;4,4'-Dicarboethoxy-2,2'-dipyridyl; Diethyl 2,2'-bipyridine-4,4'-dicarboxylate;Diethyl 2,2'-diisonicotinate