I-CAS:2420-87-3 I-Molecular Formula:I-C16H6O6 Isisindo se-Molecular:294.22 I-EINECS:219-342-9 Omqondofana:3,3',4,4'-Biphenyltetracarboxylic dianhydride 97%; 4,4'-Biphthalic Anhydride (ihlanzwe nge-sublimation); 3,3'4,4'-Biphenyl tetracarboxylic acid dianhydride(s-BPDA); I-S-BDPA; I-S-BPDA; [5,5'-bisobenzofuran]-1,1',3,3'-tetrone; [5,5'-Biisobenzofuran]-1,1',3,3'-tetrone; 5,5'-Biisobenzofuran-1,1',3,3'-tetrone