1 2 4 5 tetrakis 4 carboxyphenyl benzene July 8, 2019 16 32 64 128 Benzene-1 2 4 5-tetracarboxylic dianhydride 1 2 4 5-benzenetetracarboxylic acid 1 2 4-benzenetricarboxylic anhydride 1 2 4 5 tetrachlorobenzene
