73840-15-0 NSC 94515 Piperazine, 1,4-bis(3-(3-butylureido)propyl)- Urea, 1,1'-(1,4-piperazinediylbis(trimethylene))bis(3-butyl- Urea, N,N''-(1,4-piperazinediyldi-3,1-propanediyl)bis(N'-butyl- (9CI)