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2,3′,3,4′-Biphenyltetracarboxylic dianhydride36978-41-343 % similar 4,4′-(Hexafluoroisopropylidene)diphthalic anhydride1107-00-243 % similar Benzoic anhydride93-97-042 % similar 1-[4-(2-Phenylethynyl)phenyl]ethanone1942-31-042 % similar 4-Nitrophthalic anhydride5466-84-241 % similar Diphenylacetylene501-65-541 % similar 3,4'-Oxydiphthalic anhydride50662-95-841 % similar 4,5-Difluorophthalic anhydride18959-30-340 % similar 1,2-Naphthalenedicarboxylic anhydride5343-99-740 % similar Benzylidenephthalide575-61-140 % similar 4,5-Dichlorophthalic anhydride942-06-340 % similar Perylenetetracarboxylic dianhydride128-69-839 % similar Diphenyl phthalate84-62-839 % similar 3-Chlorophthalic anhydride117-21-538 % similar 1,8-Naphthalic anhydride81-84-538 % similar 2,2-Bis(4-(3,4-dicarboxyphenoxy)phenyl)propane dianhydride38103-06-938 % similar Phenylpropynoic acid methyl ester4891-38-738 % similar 4-Phenyl-3-butyn-2-one1817-57-837 % similar Pyridine-3,4-dicarboxylic anhydride4664-08-837 % similar Tetraphenylphthalic anhydride4741-53-137 % similar