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4,5-Difluorophthalic anhydride18959-30-352 % similar 4,5-Dichlorophthalic anhydride942-06-352 % similar 4-(Phenylethynyl)phthalic anhydride119389-05-852 % similar 4-Nitrophthalic anhydride5466-84-252 % similar Perylenetetracarboxylic dianhydride128-69-850 % similar Pyridine-3,4-dicarboxylic anhydride4664-08-847 % similar 2,2-Bis(4-(3,4-dicarboxyphenoxy)phenyl)propane dianhydride38103-06-946 % similar 3,4'-Oxydiphthalic anhydride50662-95-846 % similar 3,3′,4,4′-Biphenyltetracarboxylic acid22803-05-045 % similar 3-Chlorophthalic anhydride117-21-544 % similar Trimethyl trimellitate2459-10-144 % similar 1,8-Naphthalic anhydride81-84-543 % similar Dimethyl 4-hydroxyphthalate22479-95-441 % similar 1,2-Naphthalenedicarboxylic anhydride5343-99-741 % similar 1,6,7,12-Tetrachloroperylene tetracarboxylic acid dianhydride156028-26-141 % similar 4-Chloro-1,8-naphthalic anhydride4053-08-140 % similar 4-META70293-55-940 % similar Furo[3,4-b]pyridine-5,7-dione699-98-939 % similar Tetramethyl pyromellitate635-10-939 % similar Benzoic anhydride93-97-039 % similar