1,4-Bis(3,4-Dicarboxyphenoxy)benzene Dianhydride

1,4-Benzenedicarboxylic Acid Bis(4-Aminophenyl)

1-(4-Aminophenyl)-2,3-dihydro-1,3,3-trimethyl-1H

1,4,5,8-Naphthalenetetracarboxylic Dianhydride