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4,5-Difluorophthalic anhydride18959-30-348 % similar 4,5-Dichlorophthalic anhydride942-06-348 % similar Trimellitic anhydride chloride1204-28-047 % similar Ethylene bis[1,3-dihydro-1,3-dioxoisobenzofuran-5-carboxylate]1732-96-347 % similar Bis[(3,4-dicarboxylic anhydride) phenyl]terephthalate21117-79-347 % similar 4-tert-Butylphthalic anhydride32703-79-047 % similar 1,2-Naphthalenedicarboxylic anhydride5343-99-747 % similar Trimellitic anhydride552-30-747 % similar Benzoic anhydride93-97-046 % similar 3-Hydroxy-1,8-naphthalic anhydride23204-36-645 % similar 4,4′-(Hexafluoroisopropylidene)diphthalic anhydride1107-00-245 % similar 3-Chlorophthalic anhydride117-21-545 % similar Furo[3,4-b]pyridine-5,7-dione699-98-945 % similar 4-(Phenylethynyl)phthalic anhydride119389-05-844 % similar 4-Nitrophthalic anhydride5466-84-244 % similar 3-Iodophthalic anhydride28418-88-443 % similar 3-Hydroxyphthalic anhydride37418-88-543 % similar 3-Methylphthalic anhydride4792-30-743 % similar 3-Fluorophthalic anhydride652-39-143 % similar 3,6-Dichlorophthalic anhydride4466-59-542 % similar