2,7-Diaminodiphenylenesulfone 3,7-Diaminodiphenylene sulfone 3,7-Dibenzothiophenediamine, 5,5-dioxide (8CI)(9CI) 4-18-00-07289 (Beilstein Handbook Reference) 6259-19-4 BRN 0212930 Benzidine sulfone Biphenylene sulfone, 3,7-diamino- NSC 13966 USAF ND-67