5-23-01-00357 (Beilstein Handbook Reference) 55290-97-6 BRN 0833977 N,N''-(1,4-Piperazinediyldi-3,1-propanediyl)bis(N'-ethylurea) Urea, N,N''-(1,4-piperazinediyldi-3,1-propanediyl)bis(N'-ethyl-