55291-05-9 NSC94505 Piperazine, 1,4-bis[3-[3-(p-bromophenyl)ureido]propyl]- Urea, 1,1'-[1,4-piperazinediylbis(trimethylene)]bis[3-(p-bromophenyl)- Urea, N,N''-(1,4-piperazinediyldi-3,1-propanediyl)bis[N'-(4-bromophenyl)-