(1,1'-Bianthracene)-9,9',10,10'-tetrone, 4,4'-diamino- 12270-62-1 167139-80-2 4,4'-Diamino(1,1'-bianthracene)-9,9',10,10'-tetraone 4051-63-2 58985-28-7 65742-19-0 EINECS 223-754-4