Synonyms: Formanilide,4,4'-sulfonylbis- (4CI); Formanilide, 4',4''-sulfonylbis- (6CI,7CI);Formanilide, 4',4'''-sulfonylbis- (8CI); 4,4'-Diformamidodiphenyl sulfone; DFD;DFD (pharmaceutical); DFDDS; Diformyl diaminodiphenylsulfone;Diformyl-4,4'-sulfonyldianiline; Diformyldapsone; Formilone; NSC 53674;p,p'-Sulfonylbis(formanilide)