1,3-Piperidinedicarboxamide, N(sup 1),N'(sup 1)-ethylenebis(N(sup 1)-butyl-N(sup 3), N(sup 3)-diethyl- 40541-07-9 N,N'-Dibutyl-N,N'-bis(3-(N,N'-diethylcarbamoyl)piperidinocarbonyl)ethylenediamine