1,1'-(4,4'-Biphenylylenedimethylene)bis(3-(2-chloroethyl)-3-nitrosourea) 54340-56-6 NSC 116821 NSC-1168211 Urea, 1,1'-(4,4'-biphenylylenedimethylene)bis(3-(2-chloroethyl)-3-nitroso- Urea, N,N''-((1,1'-biphenyl)-4,4'-diylbis(methylene))bis(N'-(2-chloroethyl)-N'-nitroso- (9CI)