Alias：3,3',4,4'-Benzophenonetetracarboxylic dianhydride;BTDA;4,4-Carbonyldiphthalic anhydride;BTDA~4,4-Carbonyldiphthalic anhydride;benzophenone-3,3:4,4-tetracarboxylic dianhydride;3,3,4,4-Benzophenontetracarbonsaeuredianhydrid,;Benzophenone-3,3?4,4?tetracarboxylic dianhydride;1,3-Isobenzofurandione, 5,5'-carbonylbis-;3,3',4,4'-Benzophenonetetracarboxylic acid dianhydride;3,3',4,4'-Tetracarboxybenzophenone dianhydride;3,3’,4,4’-benzophenonetetracarboxylicaciddianhydride;3-Isobenzofurandione,5,5’-carbonylbis-1;4,4'-Carbonylbis[phthalic anhydride];4,4'-Diphthalic anhydride ketone;5,5’-carbonylbis-3-isobenzofurandione;Benzophenone-3,3',4,4'-tetracarboxylic dianhydride;3,3',4,4'-Benzophenonetetracarboxylic Dianhydride (purified by sublimation);3,3`,4,4`-Benzophenonetetracarboxylic dianhydride;3.3'.4.4'-Benzophenonetetracarboxylicdianhydride;5-(1,3-dioxo-2-benzofuran-5-carbonyl)-2-benzofuran-1,3-dione;3,3,4,4-Benzophenonetetracarboxylic Acid Dianhydride;1,3-Isobenzofurandione,5,5'-carbonylbis;3,3,4,4-Benzophenonetetracarboxylic dianhydride;3,3‘,4,4‘-Benzophenonet;4,4'-Carbonylbis(phthalic anhydride);4,4'-Carbonyldiphthalic anhydride;5,5'-Carbonylbis(isobenzofuran-1,3-dione);Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride;Benzophenonetetracarboxylic acid dianhydride;NotAvailable;Phthalic anhydride,4,4'-carbonyldi;4,4'-Carbonyldiphthalic Anhydride (purified by sublimation);Benzophenonetetracarboxylic dianhydride;Benzophenonetetracarboxylic anhydride;Phthalic anhydride, 4,4'-carbonyldi-;Benzophenonetetracarboxylic acid anhydride;3,3',4,4'-Benzophenonet