Benzophenonetetracarboxylic dianhydride2421-28-5100 % similar Trimellitic anhydride chloride1204-28-065 % similar Ethylene glycol bis(anhydrotrimellitate)1732-96-365 % similar Trimellitic anhydride552-30-765 % similar Bpda2420-87-361 % similar 4,4′-Oxydiphthalic anhydride1823-59-257 % similar 4-Chlorophthalic anhydride118-45-655 % similar 4-Methylphthalic anhydride19438-61-055 % similar 4-Fluorophthalic anhydride319-03-955 % similar 4-Bromophthalic anhydride86-90-855 % similar Trimethyl trimellitate2459-10-153 % similar Naphthalenetetracarboxylic dianhydride81-30-152 % similar Phthalic anhydride85-44-952 % similar 3,3′,4,4′-Diphenyl sulfone tetracarboxylic dianhydride2540-99-052 % similar Benzophenonetetracarboxylic acid2479-49-450 % similar 4-tert-Butylphthalic anhydride32703-79-050 % similar 2,3-Naphthalenedicarboxylic anhydride716-39-250 % similar 4,4′-(Hexafluoroisopropylidene)diphthalic anhydride1107-00-249 % similar 4-(Phenylethynyl)phthalic anhydride119389-05-847 % similar 4-Nitrophthalic anhydride5466-84-247 % similar