1-Piperazinecarboxamide, N,N'-ethylenebis(N-butyl-4-methyl- 40576-29-2 5-23-01-00108 (Beilstein Handbook Reference) BRN 0854520 N,N'-Dibutyl-N,N'-bis(4-methylpiperazinocarbonyl)ethylenediamine N,N'-Ethylenebis(N-butyl-4-methyl-1-piperazinecarboxamide)