4,4''-Dibromo-2,2',2'',5,5',5''-hexamethyl-1,1':4',1''-terphenyl
2',5'-Dimethyl-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid
2',3',5',6'-Tetramethyl-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid
