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4-Hydroxyphthalic anhydride27550-59-0100 % similar Dimethyl 4-hydroxyphthalate22479-95-470 % similar 5,5'-Bi-2-benzofuran-1,1',3,3'-tetrone2420-87-361 % similar 4-Bromophthalic anhydride86-90-860 % similar 4,4'-Oxydiphthalic anhydride1823-59-257 % similar 2,6-Dihydroxyanthraquinone84-60-655 % similar 4-Chlorophthalic anhydride118-45-655 % similar 4,4'-(1,4-Phenylenedioxy)bisphthalic Anhydride17828-53-455 % similar 4-Methylphthalic anhydride19438-61-055 % similar 4,4'-Carbonyldiphthalic anhydride2421-28-555 % similar 4-Fluorophthalic anhydride319-03-955 % similar Trimellitic anhydride552-30-755 % similar 5-Hydroxyphthalide55104-35-353 % similar 3-Hydroxy-1,8-naphthalic anhydride23204-36-653 % similar Naphthalenetetracarboxylic dianhydride81-30-152 % similar Phthalic anhydride85-44-952 % similar 4-Hydroxyphthalic acid610-35-552 % similar 3,3',4,4'-Diphenyl sulfone tetracarboxylic dianhydride2540-99-052 % similar Methyl 2,5-dihydroxybenzoate2150-46-151 % similar Methyl 2,4-dihydroxybenzoate2150-47-251 % similar