1H,3H-Benzo[1,2-c:4,5-c']difuran-1,3,5,7- tetrone,polymer with 1,3-benzenediamine,5,5'-carbonylbis[1,3-isobenzofurandione] and 4,4'-oxybis[benzenamine]
1H,3H-Benzo[1,2-c:4,5-c']difuran-1,3,5,7- tetrone,polymer with 1,3-benzenediamine,5,5'-carbonylbis[1,3-isobenzofurandione] and 4,4'-oxybis[benzenamine]