(1,1'-Biphenyl)-3,3'-dicarboxylic acid (9CI) 3,3'-Bibenzoic acid 3,3'-Biphenyldicarboxylic acid 4-09-00-03562 (Beilstein Handbook Reference) 612-87-3 AI3-17978 BRN 1971768 m,m'-Dicarboxybiphenyl