4',4''',4''''',4'''''''-Methanetetrayltetrakis[[1,1'-biphenyl]-3,5-dicarboxylic acid]
5'-(2,5-dicarboxyphenyl)-[1,1':3',1''-terphenyl]-2,2'',5,5''-tetracarboxylic acid
5,5',5''-[1,3,5-Benzenetriyltris(carbonylimino)]tris[1,3-benzenedicarboxylic acid]