1,3-Isobenzofurandione, 5,5'-carbonylbis-, polymer with 1,3-benzenediamine and 4,4'-oxybis(benzenamine) 101062-85-5 124056-99-1 158164-03-5 31942-21-9 4,4'-Oxydianiline, m-phenylenediamine, 4,4'-carbonyldiphthalic acidpolymer 81612-15-9