4,4'-Diformamidodiphenyl sulfone 6784-25-4 DFD DFDDS Diformyl diaminodiphenylsulfone Diformyl-4,4'-sulfonyldianiline Diformyldapsone Formamide, N,N'-(sulfonyldi-4,1-phenylene)bis- Formanilide, 4',4'''-sulfonylbis- Formanilide, 4',4'''-sulfonyldi- Formilone N,N'-Diformyl-p,p'-diaminodiphenylsulfone NSC53674 Sulfone, bis(N-formyl-p-aminophenyl) WLN: VHMR DSWR DMVH WR 6798 p,p'-Sulfonylbisformanilide