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3,3',4,4'-Biphenyltetracarboxylic dianhydride; 3,4,3',4'-Biphenyltetracarboxylic acid dianhydride;4,4'-Biphthalic anhydride; BPDA;[1,1'-Biphenyl]-3,3',4,4'-tetracarboxylic3,4:3',4'-dianhydride CAS 2420-87-3 PubChem CID 75494
O=C1OC(=O)c2cc(-c3ccc4c(c3)C(=O)OC4=O)ccc21 -
6,15-dioxatetracyclo[9.7.0.04,17.08,13]octadeca-1,3,8,10,12,17-hexaene-5,7,14,16-tetrone CAS 2420-87-3 PubChem CID 18680274
O=C1OC(=O)c2ccc3cc2C(=O)OC(=O)c2cc-3ccc21