dimethyl (2,2'-bipyridine)-5,5'-dicarboxylate;dimethyl (2,2’-bipyridine)-5,5’-dicarboxylate;dimethyl [2,2′-bipyridine]-5,5′-dicarboxylate;[2,2']Bipyridinyl-5,5'-dicarboxylic acid dimethyl ester;4,4′-bis(methyl carboxylate)-2,2′-bipyridine;