3,3′,4,4′-Diphenyl sulfone tetracarboxylic dianhydride2540-99-0100 % similar Bpda2420-87-357 % similar 4,4′-Oxydiphthalic anhydride1823-59-253 % similar 4-Chlorophthalic anhydride118-45-652 % similar 4-Methylphthalic anhydride19438-61-052 % similar Benzophenonetetracarboxylic dianhydride2421-28-552 % similar 4-Fluorophthalic anhydride319-03-952 % similar 4-Bromophthalic anhydride86-90-852 % similar Naphthalenetetracarboxylic dianhydride81-30-148 % similar Phthalic anhydride85-44-948 % similar Trimellitic anhydride chloride1204-28-047 % similar Ethylene glycol bis(anhydrotrimellitate)1732-96-347 % similar 4-tert-Butylphthalic anhydride32703-79-047 % similar Trimellitic anhydride552-30-747 % similar 2,3-Naphthalenedicarboxylic anhydride716-39-247 % similar 4,4′-(Hexafluoroisopropylidene)diphthalic anhydride1107-00-246 % similar 4-(Phenylethynyl)phthalic anhydride119389-05-845 % similar 4-Nitrophthalic anhydride5466-84-245 % similar 4,5-Dichlorophthalic anhydride942-06-344 % similar 2,3′,3,4′-Biphenyltetracarboxylic dianhydride36978-41-343 % similar