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4,5-Difluorophthalic anhydride18959-30-3100 % similar 4-Fluorophthalic anhydride319-03-957 % similar 3,6-Difluorophthalic anhydride652-40-454 % similar 4,5-Dichlorophthalic anhydride942-06-354 % similar 3-Fluorophthalic anhydride652-39-153 % similar 5,5'-Bi-2-benzofuran-1,1',3,3'-tetrone2420-87-352 % similar 2,3-Naphthalenedicarboxylic anhydride716-39-252 % similar Methyl 2-amino-4,5-difluorobenzoate207346-42-750 % similar Methyl 2-bromo-4,5-difluorobenzoate878207-28-448 % similar 4,4'-Oxydiphthalic anhydride1823-59-248 % similar 4,5-Difluorophthalic acid18959-31-448 % similar Naphthalenetetracarboxylic dianhydride81-30-148 % similar Phthalic anhydride85-44-948 % similar 4-tert-Butylphthalic anhydride32703-79-047 % similar 4-Chlorophthalic anhydride118-45-647 % similar 4,4'-(1,4-Phenylenedioxy)bisphthalic Anhydride17828-53-447 % similar 4-Methylphthalic anhydride19438-61-047 % similar 4,4'-Carbonyldiphthalic anhydride2421-28-547 % similar 4-Hydroxyphthalic anhydride27550-59-047 % similar 4-Bromophthalic anhydride86-90-847 % similar