36978-40-2

biphenyl-2,3,3',4-tetracarboxylicaci 2,3,3',4'-biphenyltetracarboxylic acid 2,3,3',4'-Biphenyltetracarboxylic acid biphenyl-2,3,3',4-tetracarboxylic acid 1,1'-Biphenyl-2,3',3,4'-tetracarboxylic acid 1,1'-Biphenyl-2,3,3',4'-tetracarboxylic acid