Twenty-three derivatives of N-alkyl-N-2-chloroethyl-N-ω-chloroalkylamine were prepared. It was proved that these compounds are completely monofunctional biological alkylating agents from the estimation of reaction velocity in vitro, but neverthless they exhibit a strong antitumor effect on rats bearing Yoshida sarcoma. The fact is very interesting from the point of the mode of action of nitrogen mustards.
