4,4'-Biphenyldisulfonamide, N,N'-bis(phenylsulfonyl)- 7218-46-4 N,N'-Bis(phenylsulfonyl)-4,4'-biphenyldisulfonimide NSC525224 [1,1'-Biphenyl]-4,4'-disulfonamide, N,N'-bis(phenylsulfonyl)-