Phthalicanhydride, 4,4'-isopropylidenedi- (7CI,8CI);2,2-Bis(3,4-dicarboxyphenyl)propane dianhydride; 2,2-Diphenylpropane-3,4,3',4'-tetracarboxylicacid dianhydride; 4,4'-Isopropylidenedi[phthalic anhydride]
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