A series of tetraamines derived from 1, 8-diaminooctane was prepared and tested as antitumor agents. The reaction of l&diaminooctane with acrylonitrile gave N,”-bis (cyanoethyl)-1, 8-diaminooctane, which was reduced to tetramine 20. Alkylation of the terminal nitrogen atoms of the tetra-Boc derivative of this compound by methyl or ethyl halide followed by removal of the Boc groups gave the bis (alky1) polyamines 26a and 26b, ...