Diethylenetriaminepentaacetic dianhydride
Benzophenone-3,3',4,4'-tetracarboxylic dianhydride
Bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride
1,2,4,5-Cyclohexanetetracarboxylic Dianhydride
