(1,1'-Biphenyl)-3,3'-dicarboxylic acid, 4,4'-diamino- 2-14-00-00345 (Beilstein Handbook Reference) 2130-56-5 3,3'-Benzidinedicarboxylic acid 3,3'-Biphenyldicarboxylic acid, 4,4'-diamino- 3,3'-DICARBOXYBENZIDINE 4,4'-Diamino-3,3'-biphenyldicarboxylic acid 5,5'-Bianthranilic acid 5,5'-Dianthranilic acid 78020-20-9 BRN 2815505 Benzidine-3,3'-dicarboxylic acid Benzidine-M,M'-dicarboxylic acid EINECS 218-348-9 HSDB 2738 Kwas benzydynodwukaroksylowy [Polish]