2,2'-联***-4,4'-二羧酸/2,2'-Bipyridyl-4,4'-dicarboxylicacid/4,4'-Dicarboxy-2,2'-bipyridine/cas:6813-38-3(含量,98%;年产量10吨)cas：6813-38-32,2'-联***-3,3'-二羧酸/2,2'-Bipyridyl-3,3'-dicarboxylicacid/3,3'-Dicarboxy-2,2'-bipyridine(含量,98%;年产量10吨)cas:4433-01-62,2'-联***-5,5'-二羧酸/2,2'-Bipyridyl-5,5'-dicarboxylicacid/5,5'-Dicarboxy-2,2'-bipyridine(含量,98%;年产量10吨)cas:1802-30-82,2'-联***-6,6'-二羧酸/2,2'-Bipyridyl-6,6'-dicarboxylicacid/6,6'-Dicarboxy-2,2'-bipyridine(含量,98%;年产量10吨)cas:4479-74-7)